$\lim_{x\to0}\left(\frac{1-\cos\left(2x\right)}{e^2-\sin\left(x\right)-1}\right)$

$3n+\log\left(4\right)\cdot.3$

$\lim_{x\to0}\left(x+e^{\frac{x}{8}}\right)^{\frac{8}{x}}$

$\left(8m^3+3n^3\right)\left(8m^3-3n^3\right)$

$\lim_{x\to1}\left(\frac{x^2+x-2}{\ln\left(x\right)}\right)$

$-\frac{x}{2}+6=5$

$7y^{3\:}+6y^2$