$\int\cot^2\left(x\right)\sec^2\left(x\right)dx$

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

$\int\left(t^2+3t+4\right)\cdot\cos\left(2t\right)dt$

$-326+200$

$x+3\frac{1}{2}y-z-7x-\frac{1}{2}y+2z-5\frac{1}{3}x+y-5z+3z$

$\left(85-10\right)\cdot2$

$\frac{1+tan^2x}{cscxsecx}$