$4x^{-2}$

$\frac{-3\cos\left(2x\right)}{\sin\left(x\right)-\cos\left(x\right)}$

$4\left(y+3\right)+8\left(y-4\right)+6$

$238.4+75.065+3469.8+1007$

$\frac{dy}{dt}+8y=34e^{9t}$

$\int\csc\left(\frac{3}{4}x\right)\cot\left(\frac{3}{4}x\right)dx$

$\frac{du}{dt}=\frac{t^4+3u}{t}$