$\sin\left(2sin^{-1}\frac{1}{2}\right)$
$-x^2+12x-36$
$x^2+2x-7$
$\left(2a^2+3b^2-3ab\right)\:\left(2a^2+3b^2+3ab\right)$
$8c^2-16y^2$
$\left(2y+5\right)dx=xydy$
$\int x\left(2x^2-6x+\frac{3}{x^2+1}\right)dx$
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