diff --git a/src/tasks/tasks01/pfmath.rs b/src/tasks/tasks01/pfmath.rs
index 0f5d134..6830e1a 100644
--- a/src/tasks/tasks01/pfmath.rs
+++ b/src/tasks/tasks01/pfmath.rs
@@ -1,20 +1,16 @@
-use std::usize;
 
 use anyhow::Result;
 use base64::{prelude::BASE64_STANDARD, Engine};
 use serde_json::Value;
 
-use crate::{
-    tasks,
-    utils::{
+use crate::utils::{
         self,
         dff::ddf,
         edf::edf,
         field::FieldElement,
         poly::{gcd, Polynomial},
         sff::{sff, Factors},
-    },
-};
+    };
 
 pub fn gfpoly_add(args: &Value) -> Result<Polynomial> {
     let poly_a = Polynomial::from_c_array(&args["A"].clone());
@@ -126,7 +122,7 @@ pub fn gfpoly_gcd(args: &Value) -> Result<Polynomial> {
     Ok(result)
 }
 
-pub fn gfpoly_factor_sff(arsg: &Value) -> Result<Vec<(Factors)>> {
+pub fn gfpoly_factor_sff(arsg: &Value) -> Result<Vec<Factors>> {
     let poly_f = Polynomial::from_c_array(&arsg["F"].clone());
 
     let mut factors = sff(poly_f);
@@ -143,7 +139,7 @@ pub fn gfpoly_factor_sff(arsg: &Value) -> Result<Vec<(Factors)>> {
     Ok(result)
 }
 
-pub fn gfpoly_factor_ddf(arsg: &Value) -> Result<Vec<(utils::dff::Factors)>> {
+pub fn gfpoly_factor_ddf(arsg: &Value) -> Result<Vec<utils::dff::Factors>> {
     let poly_f = Polynomial::from_c_array(&arsg["F"].clone());
 
     let mut factors = ddf(poly_f);
diff --git a/src/utils/dff.rs b/src/utils/dff.rs
index be63040..bcd1ca0 100644
--- a/src/utils/dff.rs
+++ b/src/utils/dff.rs
@@ -1,6 +1,6 @@
 use std::usize;
 
-use num::{cast::AsPrimitive, pow::Pow, traits::ToBytes, BigUint, FromPrimitive};
+use num::{pow::Pow, BigUint, FromPrimitive};
 use serde::{Deserialize, Serialize};
 
 use super::poly::{gcd, Polynomial};
diff --git a/src/utils/edf.rs b/src/utils/edf.rs
index 134a743..80f552c 100644
--- a/src/utils/edf.rs
+++ b/src/utils/edf.rs
@@ -1,8 +1,6 @@
-use base64::{prelude::BASE64_STANDARD, Engine};
-use num::{BigUint, FromPrimitive, Integer, One};
+use num::{BigUint, FromPrimitive, One};
 use rand::Rng;
 
-use crate::utils::{field::FieldElement, poly::non_monic_gcd};
 
 use super::poly::{gcd, Polynomial};
 
diff --git a/src/utils/field.rs b/src/utils/field.rs
index 7b4059c..9b9876b 100644
--- a/src/utils/field.rs
+++ b/src/utils/field.rs
@@ -1,5 +1,4 @@
 use base64::prelude::*;
-use rand::{random, Rng, RngCore};
 use std::{u128, u8, usize};
 
 use std::{
diff --git a/src/utils/poly.rs b/src/utils/poly.rs
index eeffc34..68edb82 100644
--- a/src/utils/poly.rs
+++ b/src/utils/poly.rs
@@ -1,8 +1,9 @@
 use crate::utils::field::ByteArray;
-use base64::alphabet::BIN_HEX;
 use base64::prelude::*;
+
 use num::traits::FromBytes;
 use num::{BigInt, BigUint, One, Zero};
+
 use std::{str::FromStr, u128, u8, usize};
 
 use std::{