$\frac{4x^2}{2-2\cos\left(x\right)}$
$\left(3x-4x\right)^3$
$\lim_{x\to0}\left(\frac{2sin\left(10x\right)}{5x}\right)$
$\frac{x^2-169}{x-13}$
$\frac{m}{3}-3<6$
$\int e^{-ax}dx$
$-4\left(4-2+5\right)-1-\left|8+\left(-3-1\right)-\left(-7-4\right)\right|+3-3$
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