$\lim_{x\to0}\left(\frac{1+\tan\left(x\right)}{1+\sin\left(x\right)}\right)^{\frac{2}{x}}$

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

$\frac{x^8+125x^5+x^3+1}{x+5}$

$\sin\left(3x\right)\left(4\sin\left(3x\right)-3\cos\left(3x\right)\right)-4$

$0.8\left(9+4y\right)$

$\left(4y^3+5y\right)^5$

$\sqrt{5m^2+m-4}=2m$