$\frac{2\sin\left(2x\right)}{\tan\left(x\right)+\cot\left(x\right)}$
$\lim_{x\to\infty}\left(\frac{x^8-34}{x-3}\right)$
$x^{2\:}-\:5x=\:14$
$\left(\frac{2x^4}{3y^{-2}}\right)^{-3}$
$3\cdot\left(-5\right)+8:\left(-4\right)-1$
$=\frac{3x^2}{1-x}$
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