Update README.md

README.md

@@ -92,7 +92,7 @@ We used this dataset to evaluate the mathematical abilities of models from the `
 We propose a weighted accuracy metric where results for problems requiring more steps are weighted by the square of the step count:
 
 $$
-\text{weighted\_score} = \frac{\sum\limits_{s=1}^{N_{cls}} (\text{mean}(\text{correct}_s) \cdot s^2)}{\sum\limits_{s=1}^{N_{cls}} s^2} \quad N_{cls} = 15
+\text{weighted\_score} = \frac{\sum\limits_{s=1}^{N_{cls}} (\text{mean}(\text{correct}_s) \cdot s^2)}{\sum\limits_{s=1}^{N_{cls}} s^2}, \quad N_{cls} = 15
 $$ 
 
 Comparison table: