Update app.py

app.py

@@ -808,7 +808,7 @@ Part II. Now select the problem that is number {difficulty} on your exam, state
         * The only numerical calculations that should be done are those that could be done on a simple scientific calculator.
         * Make sure to simplify completely as far as analytical methods will allow
 4. Maintain clear formatting
-5. For Calculation or Application questions (NOT Proof questions): at the end of the solution output, print SymPy code that you would use to solve or verify the main equations in the question. 
+5. For Computation or Application questions (NOT Proof questions): at the end of the solution output, print SymPy code that you would use to solve or verify the main equations in the question. 
 Observe the folloiwng SymPy Guidelines
 {SYMPY_GUIDELINES}
 6. For problems where the subject is Real Analysis, observe the following guidelines: