$-14+-13+-3+2$
$2\cdot2\cdot2\cdot2\cdot3\cdot3$
$\int\:\left(x^7+\frac{1}{x}+x^{-3}-\cos\:\left(x\right)\right)dx$
$\frac{dy}{dx}=10x+3\sqrt{x}$
$12\cot^2\left(x\right)-31\csc\left(x\right)+32$
$\cos^2a\left(1+\cot^2a\right)$
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