$\frac{dx}{du}-x^3=x$

$\frac{dy}{dx}y=e^{x^3}$

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

$\left(\sin\left(x\right)+\tan\left(x\right)\right)\left(1-\cos\left(x\right)\right)$

$-36+2$

$\frac{x^3y^2-y^3x}{x^2y^2+x^3y}$

$\ln\sqrt{x+9}=2$