$\frac{-0,5^{-4}n^3}{2,5m^{-2}n^{-1}}$
$\frac{\left(4x^2\right)-10}{x\left(x+1\right)\left(x-5\right)}$
$\int\:\frac{x+4}{2x+6}\:dx$
$2\sin^2x+7\sin x+3=0$
$\frac{d}{dx}x^2+1$
$\int\frac{6}{\left(x+4\right)\left(x-4\right)}dx$
$-8\cdot10-\left(-3\right)$
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