$\sin\left(x\right)\cos\left(x\right)=\sin\left(2x\right)$
$\frac{x+2}{\sqrt{x+2}}$
$\lim_{x\to-3}\left(\frac{x^2-x-6}{x-3}\right)$
$-5-7+14+1\:$
$17-\left(-1\right)+\left(-5\right)$
$\lim_{x\to5}\left(-2x^2-2x+3\right)$
$6\:ln\left(x\right)\:+\:ln\left(x\:+\:1\right)$
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