$7x^2\left(2x^4+6x^3-4x^2\right)$
$5x+7\:>\:3\:\left(x+1\right)$
$\left(4x^2+3\right)\left(4x^2-8\right)$
$\frac{\sin^{2}\theta}{1-\sin^{2}\theta}$
$\left(a^2+8\right)\left(a^2+7\right)$
$x\cdot200=-400$
$\int e^{-b}\:db$
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