diff --git a/src/lib.rs b/src/lib.rs
index 628b202..0e571c1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -66,11 +66,11 @@ impl ChartManager {
     // Tests function to make sure it's able to be parsed. Returns the string of the Error produced, or an empty string if it runs successfully.
     pub fn test_func(function_string: String) -> String {
         // Factorials do not work, and it would be really difficult to make them work
-        if function_string.contains("!") {
+        if function_string.contains('!') {
             return "Factorials are unsupported".to_string();
         }
 
-        let new_func_str: String = add_asterisks(function_string.clone());
+        let new_func_str: String = add_asterisks(function_string);
         let expr_result = new_func_str.parse();
         let expr_error = match &expr_result {
             Ok(_) => "".to_string(),
diff --git a/src/misc.rs b/src/misc.rs
index efd2e2d..db3b227 100644
--- a/src/misc.rs
+++ b/src/misc.rs
@@ -72,10 +72,8 @@ pub fn add_asterisks(function_in: String) -> String {
             {
                 add_asterisk = true;
             }
-        } else if numbers.contains(&c) {
-            if letters.contains(&prev_char) | prev_pi {
-                add_asterisk = true;
-            }
+        } else if numbers.contains(&c) && letters.contains(&prev_char) | prev_pi {
+            add_asterisk = true;
         }
 
         if add_asterisk {
@@ -86,7 +84,7 @@ pub fn add_asterisks(function_in: String) -> String {
         output_string += &c.to_string();
     }
 
-    return output_string;
+    output_string
 }
 
 /// Result of screen to chart coordinates conversion.