$x^2\frac{dy}{dx}=\left(x+1\right)\left(y+2\right)$
$x+x^2=10$
$\frac{4a^2b^7}{2a^5b^7}$
$\int\frac{11x}{x^2-2x+10}dx$
$3\left(7a+8\right)+2\left(7a+2\right)$
$x2\:-\:6x\:-21\:=0$
$-22x-1$
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