$-9+3y+3+-8x+7y$
$2x\left(x-2\right)=\left(x-3\right)\left(x+2\right)$
$7a-2a+4$
$0.5^4$
$a+b+3a+4b+5a$
$7+3r<4$
$\csc\left(x\right)-5\cot^2\left(x\right)=5-3\csc^2\left(x\right)$
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