$\left(ax+2\right)^3$
$\left(3x^m+4y^m\right)\left(3x^m-7y^r\right)$
$\left(m+\frac{n}{3}\right)^4$
$-2x^3y^4\cdot8x^4y^5$
$1+2x\:=\sqrt{5x+4}$
$\frac{4x-5^n}{3^n}$
$\int\:\frac{e^x}{x}dx$
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