$\left(m-10\right)\left(m+7\right)$
$\left(cos\right)\left(x\right)\left(tan^2\right)\left(x\right)+cosx$
$\frac{\cos x-\cos x}{\sin x}=\sin x\cos x$
$\frac{3xy}{yx^2}$
$-3x^2-18x+3$
$\int\left(-9\cdot cos\left(3\cdot x\right)^3\cdot sin\left(3\cdot x\right)\right)$
$100\:-16$
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