$\left(a+2\right)^2\left(a-3\right)\left(a+3\right)$
$\left(\frac{1}{3}x+3\right)\left(\frac{1}{5}x+4\right)$
$\frac{\cos\left(2b\right)}{2}=\cos\left(b\right)$
$\left(x+ye^y\right)y'$
$4x-6x^2+x-2$
$4t\:+\:j\:=57$
$4\left(x-2y+3z\right)$
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