$2\:cot\:\theta\:\:sin^2\:\theta\:\:=\:sin\:2\theta\:$
$4x^2+6x^2-11x^2$
$x^2-\frac{3}{4}x=5$
$-2m^5+250m^2$
$e^{0.4}$
$3y+5=2y+10$
$\int_{-\infty}^{-1}\left(\frac{3}{\sqrt{5-x}}\right)dx$
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