If $a\ast b = 3a+4b-ab$, what is the value of $5\ast2$?
Question:
If $a\ast b = 3a+4b-ab$, what is the value of $5\ast2$?
Answer:
Let's think step by step.

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If $a\ast b = 3a+4b-ab$, what is the value of $5\ast2$?
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