$\int\frac{\sqrt{5}+2\tan\left(x\right)}{\cos^2\left(x\right)}dx$

$\lim\:_{x\to\:\pi\:}\left(\frac{sin\left(x-\frac{3\pi\:}{2}\right)}{1-\sqrt{cos\left(2x\right)}}\right)$

$36x^2-16b^2$

$3x^2-x-10$

$\log_a\left(\frac{1}{4}\right)$

$15a^2-6ab-8a^2+2-5ab-3+a^2-ab$

$\frac{3x^3-8x^2+6x-5}{x+2}$