$\int-x^2\ln\left(x\right)dx$
$\left(x+4\right)^2+2\left(x+4\right)-3$
$\left(x-2\right)\left(x^2-1\right)-\left(x^2-2\right)\left(3-x\right)$
$x^2+14x+198$
$3x-2y=15$
$\frac{d}{dx}\left(\frac{e^{2x}-e^{-2x}}{e^{2x}+e^{-2x}}\right)$
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