$9\cdot\left(-1\right)+\left(-5\right)$
$5x-8=x+32$
$\lim_{x\to\infty}\left(\frac{\sqrt[3]{x+5}-2}{9-x^2}\right)$
$\left(+13\right)\cdot\left(-3\right)\cdot\left(-7\right)$
$\int_0^{45}2000e^{-.08}dt$
$\frac{1}{x^2}+4x+4$
$\frac{1-2cosx-cos^2x}{sin^2x}=\frac{1-cosx}{1+cosx}$
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