$3\sin^2z$
$\frac{3x^2+15x+13}{x+4}$
$\sqrt[4]{81x^8}y^6$
$m^3\cdot m^3$
$\int x^{-2}\cdot\cos\left(x\right)dx$
$15x^2-9x$
$m.\:\left(7m\right)\:+7.\:\left(7+m\right)$
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