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

$\lim_{x\to0}\left(\frac{3x^3-5x}{2x^2+1}\right)$

$-\frac{1}{3}x^4\cdot9x^2$

$\left(m+2p^4\:\right)\left(m^2-2mp^4+4p^8\:\right)$

$\left(x\right)\left(x-5\right)\left(x+3\right)$

$b^2+3+2b^2$

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