$f\left(x\right)=e^{1-\cos\left(x\right)}$

$\:\left(3x\:-\:4\right)\:\left(3x\:+\:4\right)\:=\:9x^2\:-\:8\:$

$\frac{dy}{dx}=\frac{y+3}{2x+5}^2$

$-5g\:+\:2h\:-\:3g\:+\:g\:-2h$

$-3v^6+12v^5$

$\lim_{x\to\frac{\pi}{4}}\left(\frac{\tan\left(3x\right)}{\sin\left(2x\right)+\sec\left(^2x\right)}\right)$

$5\left(-1\right)+12$