$\left(\frac{2^{n+2}}{4^{-n}}\cdot\:\frac{8^n}{2^3}\right)^{\frac{1}{5}}$
$-14-\left(-10\right)$
$3+7u+9$
$21-+-42$
$2x^4+9x^3+6x^2+3x$
$2x\:+\:7x+\:3y\:+\:4x\:-\:2y$
$\frac{dy}{dx}=\frac{8y}{\:\left(y-4\right)x}$
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