$-\frac{sin^2\left(x\right)}{cos\left(x\right)}=cos\left(x\right)-sec\left(x\right)$

$3\left(1\right)^3-4\left(1\right)^2\left(2\right)+3\left(1\right)\left(2\right)^2-\left(2\right)^3$

$2x\left(-10x^3y\right)$

$\lim_{x\to0}\left(\frac{\sqrt{x+1}-1}{\sqrt{x}}\right)$

$\left(x^2+2x+3\right)^2\left(x\:2\:+2x+3\right)\:^2$

$\lim_{x\to-1}\left(\frac{4x^4+5x^3+3x+4}{x+1}\right)$

$\int_0^{\frac{\pi}{2}}\left(sin^{n-2}x\:cos^2x\right)dx$