$\lim_{x\to0}\left(\frac{4x+2sin\left(3x\right)}{x-sin\left(2x\right)}\right)$
$a^2\:+a+a^2+a$
$2x^2-10x+12=0$
$\lim_{x\to\frac{5\pi}{6}}\left(\cos\left(3x\right)\sin\left(3x\right)\right)$
$\int_1^5\left(100-e^{-\frac{x}{10}}\right)dx$
$\left(2x+3\right)\left(2x-3\right)^2$
$\frac{2}{\sqrt{b}+3}$
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