diff --git a/kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt b/kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt
index 1a324f72c..49184468b 100644
--- a/kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt
+++ b/kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt
@@ -6,7 +6,6 @@
 package space.kscience.kmath.functions
 
 import space.kscience.kmath.operations.*
-import kotlin.jvm.JvmName
 import kotlin.math.max
 import kotlin.math.min
 
diff --git a/kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/labeledRationalFunctionUtil.kt b/kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/labeledRationalFunctionUtil.kt
index 26e8ab17a..575dfed48 100644
--- a/kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/labeledRationalFunctionUtil.kt
+++ b/kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/labeledRationalFunctionUtil.kt
@@ -1,130 +1,23 @@
-package math.polynomials
+/*
+ * Copyright 2018-2021 KMath contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
 
-import math.ringsAndFields.*
-import space.kscience.kmath.functions.LabeledRationalFunction
+package space.kscience.kmath.functions
 
 
-fun <T: Ring<T>> T.toLabeledRationalFunction() = LabeledRationalFunction(this.toLabeledPolynomial())
-
-// region Operator extensions
-
-// region Field case
-
-fun <T: Field<T>> LabeledRationalFunction<T>.reduced(): LabeledRationalFunction<T> {
-    val greatestCommonDivider = polynomialGCD(numerator, denominator)
-    return LabeledRationalFunction(
-        numerator / greatestCommonDivider,
-        denominator / greatestCommonDivider
-    )
-}
-
-// endregion
-
-// region Constants
-
-operator fun <T: Ring<T>> T.plus(other: LabeledRationalFunction<T>) = other + this
-operator fun <T: Ring<T>> Integer.plus(other: LabeledRationalFunction<T>) = other + this
-operator fun <T: Ring<T>> Int.plus(other: LabeledRationalFunction<T>) = other + this
-operator fun <T: Ring<T>> Long.plus(other: LabeledRationalFunction<T>) = other + this
-
-operator fun <T: Ring<T>> T.minus(other: LabeledRationalFunction<T>) = -other + this
-operator fun <T: Ring<T>> Integer.minus(other: LabeledRationalFunction<T>) = -other + this
-operator fun <T: Ring<T>> Int.minus(other: LabeledRationalFunction<T>) = -other + this
-operator fun <T: Ring<T>> Long.minus(other: LabeledRationalFunction<T>) = -other + this
-
-operator fun <T: Ring<T>> T.times(other: LabeledRationalFunction<T>) = other * this
-operator fun <T: Ring<T>> Integer.times(other: LabeledRationalFunction<T>) = other * this
-operator fun <T: Ring<T>> Int.times(other: LabeledRationalFunction<T>) = other * this
-operator fun <T: Ring<T>> Long.times(other: LabeledRationalFunction<T>) = other * this
-
-// endregion
-
-// region Polynomials
-
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.plus(other: UnivariatePolynomial<T>) =
-    LabeledRationalFunction(
-        numerator + denominator * other.toLabeledPolynomial(),
-        denominator
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.plus(other: UnivariateRationalFunction<T>) =
-    LabeledRationalFunction(
-        numerator * other.denominator.toLabeledPolynomial() + denominator * other.numerator.toLabeledPolynomial(),
-        denominator * other.denominator.toLabeledPolynomial()
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.plus(other: Polynomial<T>) =
-    LabeledRationalFunction(
-        numerator + denominator * other.toLabeledPolynomial(),
-        denominator
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.plus(other: NumberedRationalFunction<T>) =
-    LabeledRationalFunction(
-        numerator * other.denominator.toLabeledPolynomial() + denominator * other.numerator.toLabeledPolynomial(),
-        denominator * other.denominator.toLabeledPolynomial()
-    )
-
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.minus(other: UnivariatePolynomial<T>) =
-    LabeledRationalFunction(
-        numerator - denominator * other.toLabeledPolynomial(),
-        denominator
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.minus(other: UnivariateRationalFunction<T>) =
-    LabeledRationalFunction(
-        numerator * other.denominator.toLabeledPolynomial() - denominator * other.numerator.toLabeledPolynomial(),
-        denominator * other.denominator.toLabeledPolynomial()
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.minus(other: Polynomial<T>) =
-    LabeledRationalFunction(
-        numerator - denominator * other.toLabeledPolynomial(),
-        denominator
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.minus(other: NumberedRationalFunction<T>) =
-    LabeledRationalFunction(
-        numerator * other.denominator.toLabeledPolynomial() - denominator * other.numerator.toLabeledPolynomial(),
-        denominator * other.denominator.toLabeledPolynomial()
-    )
-
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.times(other: UnivariatePolynomial<T>) =
-    LabeledRationalFunction(
-        numerator * other.toLabeledPolynomial(),
-        denominator
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.times(other: UnivariateRationalFunction<T>) =
-    LabeledRationalFunction(
-        numerator * other.numerator.toLabeledPolynomial(),
-        denominator * other.denominator.toLabeledPolynomial()
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.times(other: Polynomial<T>) =
-    LabeledRationalFunction(
-        numerator * other.toLabeledPolynomial(),
-        denominator
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.times(other: NumberedRationalFunction<T>) =
-    LabeledRationalFunction(
-        numerator * other.numerator.toLabeledPolynomial(),
-        denominator * other.denominator.toLabeledPolynomial()
-    )
-
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.div(other: UnivariatePolynomial<T>) =
-    LabeledRationalFunction(
-        numerator,
-        denominator * other.toLabeledPolynomial()
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.div(other: UnivariateRationalFunction<T>) =
-    LabeledRationalFunction(
-        numerator * other.denominator.toLabeledPolynomial(),
-        denominator * other.numerator.toLabeledPolynomial()
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.div(other: Polynomial<T>) =
-    LabeledRationalFunction(
-        numerator,
-        denominator * other.toLabeledPolynomial()
-    )
-operator fun <T: Ring<T>> LabeledRationalFunction<T>.div(other: NumberedRationalFunction<T>) =
-    LabeledRationalFunction(
-        numerator * other.denominator.toLabeledPolynomial(),
-        denominator * other.numerator.toLabeledPolynomial()
-    )
-
-// endregion
-
-// endregion
\ No newline at end of file
+//// region Operator extensions
+//
+//// region Field case
+//
+//fun <T: Field<T>> LabeledRationalFunction<T>.reduced(): LabeledRationalFunction<T> {
+//    val greatestCommonDivider = polynomialGCD(numerator, denominator)
+//    return LabeledRationalFunction(
+//        numerator / greatestCommonDivider,
+//        denominator / greatestCommonDivider
+//    )
+//}
+//
+//// endregion
+//
+//// endregion
\ No newline at end of file