$\left(x+3\right)\left(x-3\right)+\left(x+2\right)\left(x-2\right)$

$\left(\frac{dy}{dx}\right)^2=\frac{y-1}{1-x}$

$\frac{\csc\left(a\right)+\cot\left(a\right)}{\sin\left(a\right)+\tan\left(a\right)}$

$\lim_{x\to3}\left(\frac{x+1}{x^2-6x+9}\right)$

$a\frac{3}{2}a\frac{4}{3}$

$-7x^2-5+6x+10x^2-8x$

$\int\:\:\frac{1}{x\left(2x+3\right)}dx$