$\frac{\tan\left(y\right)+\cot\left(y\right)}{\tan\left(y\right)-\cot\left(y\right)}=\frac{1}{1-2\cos\left(y\right)^2}$

$\int\frac{\sin\left(5x\right)+\sin\left(x\right)}{2}dx$

$\int_0^3\cos\left(xy^2\right)dx$

$\left(-8a^6+5b^9\right)^2$

$cos\frac{dy}{dx}+\left(senx+cosx\right)=\left(sen2x+2\right)$

$7+x\le9$

$-\frac{35}{5}$