$\left(-2x-2\right)\left(-2x+2\right)$
$\left(x^3+4\right)\left(x^3+5\right)$
$x^2\left(a-b\right)-12abx+9\left(a^2+b^2\right)$
$-3x^2y+y$
$\sqrt{3\left(x^2-4x+4\right)}$
$tan^2x+2tanx-1=0$
$\frac{dn}{dt}=n\cdot0.5$
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