$\left(7x^3+2x^2-11x\right)+\left(-3x^3-2x^2+4x-3\right)$

$\frac{d}{dx}\left(\ln\left(\sin\left(x^2+3x\right)\right)-\frac{1}{2}\left(sin\left(x\right)\right)^3\right)$

$x\sqrt{x^2}+4xd$

$9-12t+4t^2$

$\cot\left(2\pi\right)$

$4x^2-3+x^2-5$

$\frac{dx}{dt^2}=-\frac{1}{2}$