$\frac{1}{2}\left(x+4y\right)-\frac{7}{2}\left(4x-10y\right)+\frac{5}{2}x$
$-8-5+3-2+6+9+1-3-8$
$tan^2x-\cot x$
$2x^2+7+6x-1-7x-6x^2$
$2\left(-7f\right)$
$-4\:+\:\left(-2\right)\:-5\left(-7\right)\:-8\left(-2\right)$
$\int4a^{-5x}dx$
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