$\left(-2m-x\right)^2$
$\left(9x+5y^3\right)\left(9x-5y^3\right)$
$9x^2+10x+225$
$\left(m\:-\:1\right)\left(-1\:-m\right)$
$\lim_{x\to1}4x^2$
$684+259.68$
$\frac{d}{dx}\left(x^4-y^4+x^2-y^2=1\right)$
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