$\lim_{x\to0}\left(\frac{3x^2+9x-1}{3x}\right)$
$7\left(-2\right)^3-17\left(-2\right)^2-19\left(-2\right)+40\:\:\:$
$0,5x^2-3x-1\cdot0,4x^4-2x^2-7$
$\frac{x^3-3x^3-2x+1}{x-2}$
$\int_1^e\left(\frac{3}{4x\left(1+ln^2\left(x\right)\right)}\right)dx$
$\left(a+3\right)^3-9\left(a+3\right)\:$
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