$\frac{n}{3^n}\cdot\left(x+3\right)^n$
$-7x\:+\:2\left(x^2+\:4x-1\right)$
$\frac{x-3}{3}+\frac{2x-1}{6}$
$y=\left(5+5x\right)^x$
$\left(3x-4\right)\left(x+3\right)\left(x-2\right)$
$\frac{\sqrt{x\sqrt{x}}}{\sqrt[x]{x}}$
$e^y\left(-\sin\left(x\right)\right)+e^y\cos\left(x\right)=0$
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