Update app.py

app.py

@@ -632,6 +632,9 @@ Important: When writing mathematical expressions, use these formatting rules re
    - When writing questions involving currency expressed in dollars NEVER use the `$` symbol as it will be interepreted as math mode. ALWAYS write out the word dollars.
       * Example: 1000 dollars
    - Never use parentheses or brackets around expressions, just use the dollar signs
+      * WRONG: The student notes that ( x \geq 0 ) and ( y \geq 0 )
+      * WRONG: The student writes: [ \sin(x) = \cos(x) \ \sin(x) - \cos(x) = 0 \ \sqrt{2}\sin\left( x - \frac{\pi}{4} \right) = 0 \ x - \frac{\pi}{4} = 0 \ x = \frac{\pi}{4} ]
+      * Use the LaTeX dollar sign notation instead of ( ) or [ ]
    - make sure there are never unmatched dollar signs as that will ruin the LaTeX rendering
 
 Format your response with clear headers and bullet points."""