diff --git a/src/formatting.rs b/src/formatting.rs
index e20e378..c784145 100644
--- a/src/formatting.rs
+++ b/src/formatting.rs
@@ -1,8 +1,6 @@
-use std::str::FromStr;
-
 use rug::Float;
 
-use crate::nodes::{Error, Nodes};
+use crate::nodes::{self, Error};
 
 pub fn pretty_eval(mut input: String) -> Result<String, Error> {
     // no need to remove the characters here,
@@ -18,7 +16,7 @@ pub fn pretty_eval(mut input: String) -> Result<String, Error> {
         })
         .is_some();
 
-    let result = Nodes::from_str(&input)?.evaluate()?;
+    let result = nodes::eval(&input)?;
     let significant_digits = get_significant_digits(&result);
 
     Ok(format!(