$\int\sqrt{5+y\left(2+y\right)}dy$
$-28x^2+35x$
$\frac{17x^4-4x^34-2x^2+4x+1}{x-1}$
$\lim_{x\to0}\left(\frac{ln\left(1-3x\right)}{x}\right)$
$\left(+14\right)\:-\:\left(-37\right)$
$\left(9x^2\right)\left(x^2-4\right)$
$2x^2+4>0$
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