$\sin\left(x\right)+\frac{1}{\cot\left(x\right)}=\tan\left(x\right)\left(1+\cos\left(x\right)\right)$

$\frac{2a^3}{2b^2}b^2$

$\lim_{x\to\infty}\left(\left(\sqrt{x^2+3x}-x\right)\right)$

$4\left(8z-2a\right)-3\left(-a-4z\right)$

$\frac{dy}{dx}=\left(2-y\right)sinx$

$\frac{tan^5x}{tan^2x}$

$\left(7+3^3\right)$