$\left(3x+2+4x^2\right)+\left(2x^2-2\right)+\left(5-x^2+2x\right)$
$\left(3x^4-2x^3+4x^2+2x-3\right)\left(2x^2\right)$
$\left(-5x^2\right)\left(6x\right)\left(-75x^3\right)\left(126x^7\right)$
$-18+2$
$4b\:and\:3b\:+\:b$
$\lim_{x\to0}\left(\frac{\sin\left(x\right)-\cos\left(x\right)}{x+\sin\left(2x\right)}\right)$
$2s\left(s^2-4\right)$
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