$15x^2+3x+2=0$
$\int\frac{33x^2}{\left(x+1\right)\left(x^2+1\right)}dx$
$29-\left(-70\right)-\left(15\right)+65$
$\lim_{x\to-2}8-3x+12x^2$
$\lim_{x\to0}\left(1+\sin3x\right)^{\frac{1}{3}}$
$7\cdot703$
$\left(7y^2-1\right)\left(7y^2+2\right)$
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