$\left(\sqrt{ax+\sqrt{b}}\right)^2$

$\int\left(sec^2x-1\right)sec\left(x\right)\:tan\left(x\right)dx$

$\frac{\left(\sqrt{x^2+9-3}\right)}{x^2}$

$\lim_{x\to1}\left(\frac{1-x+lnx}{1-cos9\pi}\right)$

$\cos\left(x\right)^3+cos\left(x\right)\sin^2\left(x\right)=1$

$12u^2-8u-15m^2$

$3ab+4a+15b+20$