$-875+-745$
$\left(\tan\left(a\right)+1\right)\left(\tan\left(b\right)+1\right)$
$\left(-2x=10\right)\:=\left(-5x=25\right)$
$\int\frac{6+10x}{x^2-4}dx$
$\int5x^2\cos4xdx$
$\left(2+5i\right)+\left(3-2i\right)$
$\left(3x^3+x^2-1\right)+3\left(-x^3+x^2+5\right)$
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