Suppose that $\Join$ is an operation defined by $x \Join y = (x+2)(y-3)$. What is $((t) \Join (t+2)) - ((t+1) \Join (t+1))$?
Question:
Suppose that $\Join$ is an operation defined by $x \Join y = (x+2)(y-3)$. What is $((t) \Join (t+2)) - ((t+1) \Join (t+1))$?
Answer:
Let's think step by step.

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Suppose that $\Join$ is an operation defined by $x \Join y = (x+2)(y-3)$. What is $((t) \Join (t+2)) - ((t+1) \Join (t+1))$?
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