$\left(3x-5y\right).\left(2x+3y\right)$
$\left(2y-z\right)\left(2y+4z\right)$
$\left(4+2i\right)^3$
$2x^3+x^2-5x+2$
$\lim_{m\to0}\frac{\sin^3\left(x+m\right)-\sin^3\left(x\right)}{m}$
$x=0\:4+3x+4x^2$
$\int\:\frac{x+1}{\left(x^2+1\right)\left(x^2+2\right)}dx$
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