$\left(cos^2teta-2\right)^2$

$240\cdot2\cdot2$

$\cot\left(a\right)+\tan\left(a\right)\cos\left(a\right)$

$\frac{3+2}{\sqrt{2}-\sqrt{2}}$

$\frac{\sin\:^2x-8\sin\:\:x+7}{\cos\:^2x}=\frac{7-\sin\:\left(x\right)}{1+\sin\:\left(x\right)}$

$\int\:\frac{6y^2-5y-5}{y^3-2y^2-y+2}dy$

$\frac{\left(x+6\right)}{x\left(x+1\right)}$