$3\:\left(b+2\right)^2$
$a^2-49a+64$
$\:\frac{2+2x^2}{2+2x^2}$
$\frac{dy}{dx}=-v^2+1$
$\frac{m^3r^3+1}{1+mr}$
$2\left(4\right)^3+4$
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