$-5ab+12ab-ab$
$\frac{1}{4}m=3$
$36x^2+84x+49x^2$
$3a\frac{4}{2}$
$\int e^{-x}\sin\left(2x\right)dx$
$sin10x\:sin\:6x\:$
$\lim_{x\to0}\left(\frac{\left(1-x\right)^n-1-nx}{x^2}\right)$
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