$3x^2+5x-6$
$a^3-3a^2b+3ab^2-b^3;a=2$
$3.12-1.79$
$a^3+3\left(a\right)^2\left(3\right)+3\left(a\right)\left(3\right)^2-\left(3\right)^3$
$\lim_{x\to0}\left(\frac{e^{x^2}-e^{2x}}{x}\right)$
$9ab^2-6ab-3a$
$\frac{5}{2x-2}=\frac{5}{x^2-1}+\frac{5}{3x-3}$
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