$92\:-\:\left(-27\right)$
$-235\cdot3$
$\frac{dy}{dx}=5\left(r^2+25\right)$
$\left(-2y+3\left(x^2\right)y\right)-\left(2x-x^3\right)y'=0$
$-2x^3+5x^2-22x+152x-3$
$2\sqrt{25a}-2\sqrt{9a}+3\sqrt{4a}$
$\lim_{x\to7}\left(\frac{49-x^2}{\sqrt{9-x}\:-\sqrt{2}}\:\right)$
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