<|system|>
If $a\ast b = 3a+4b-ab$, what is the value of $5\ast2$?</s>.
<|user|>
Can you answer based on context?
<|assistant|>
That means I need to plug in $a=5$ and $b=2$ into the formula $3a+4b-ab$. I get $3(5)+4(2)-5(2)$. I get $15+8-10$. I get $13$. 