$2\left(a-b\right)+3c\left(a-b\right)$
$\left(1-n\right)\left(-1-n\right)$
$\frac{27m^4n^{6\:}-\:15m^3n^6\:+\:3mn^2}{3mn^2}$
$\int_0^{\frac{1}{2}}\left(x\sqrt{1-x^2}\right)dx$
$3\left(x^2-a^2\right)$
$\sin\left(x\right)\tan^2\left(x\right)\left(2\sin\left(x\right)+3\right)+\tan^2\left(x\right)\:=\:0$
$4sin^2\left(x-\frac{\pi\:}{3}\right)=3$
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