$\int\frac{5x^5-10x^3-2x^2+10}{x^2-5}dx$
$sin\left(2x\right)-2sin\left(x\right)+2sin^2\left(\frac{x}{2}\right)=0$
$\lim_{x\to4}\left(\frac{x^3-8}{x^2+x-6}\right)$
$3m+4n-5n+8m-2n-3m-6m$
$\int\left(t^6-6\right)^2dt$
$10x+36-38x-47$
$\frac{x+3}{x-3}\:+\frac{x}{x+5}$
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