$\int\left(5x+7\right)senxdx$
$\left(12+\cot\left(x\right)\right)\left(12-\cot\left(x\right)\right)+\csc^2\left(x\right)$
$-3xy;\:x=2;\:y=-1$
$\int\:2x^5e^{4x}\:dx$
$y-4x=2$
$\left(n+3\right)^2-\left(n-3\right)^2$
$\left(\:x+2y\right)\:\left(2y-x\right)$
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