$-4w^2\:-\:3w^2$
$\left(\frac{5}{2}m^4-3n\right)^2$
$\lim_{x\to0}\left(\frac{2^{\left(4x\right)}-1}{\tan\left(3x\right)}\right)$
$\int\frac{1}{\left(100+x^2\right)^2}dx$
$\sqrt{x}+x+12=2x$
$13-38+7x+2$
$81\cdot97$
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