$5a^2+3a+b+a^2-7a+3$
$\left(mn\right)\left(x+2\right)+c\left(x+2\right)$
$\lim_{x\to0}\left(\frac{\sin\left(x\right)}{\left(\cos\:\left(x\right)^2\right)-1}\right)$
$-6x+18<2-4x$
$\int_0^5\left[\sin\left(5x\right)+\left(3x-1\right)\right]^2dx$
$3x^2+2xy-6y=1$
$m^6m^6-21-54$
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