diff --git a/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-356-largest-roots-of-cubic-polynomials.md b/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-356-largest-roots-of-cubic-polynomials.md
index 07aeae1c6f..a4e371998d 100644
--- a/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-356-largest-roots-of-cubic-polynomials.md
+++ b/curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-356-largest-roots-of-cubic-polynomials.md
@@ -8,7 +8,7 @@ dashedName: problem-356-largest-roots-of-cubic-polynomials
 
 # --description--
 
-Let an be the largest real root of a polynomial $g(x) = x^3 - 2^n \times x^2 + n$.
+Let $a_n$ be the largest real root of a polynomial $g(x) = x^3 - 2^n \times x^2 + n$.
 
 For example, $a_2 = 3.86619826\ldots$