$\frac{dy}{dx}=\frac{3x^2}{e^y+\left(y\cdot e^y\right)}$

$\frac{\cos\left(2a\right)}{\sin\left(a\right)}+\frac{\sin\left(2a\right)}{\cos\left(a\right)}$

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

$4m+9m-12m-m$

$x+3\sqrt{x}-4=0$

$10a^4\:+\:15a^2-\:25a$

$\left(x^2-1\right)\cdot e^{x^3+3x+1}$