$4x^3-4x$
$2\cdot\left(-4\right)-9$
$\frac{1}{y}\cdot\frac{dy}{dx}=4x\cdot\ln\left(x\right)$
$\left(7-m^2\right)\cdot\left(7+m^2\right)$
$200\:+\:5\:-2$
$\frac{2x^2-3}{x+4}$
$-2\left(-2\right)^{2-1}$
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