$\sin\left(x\right)+\sin\left(x\right)\cdot\cot^2\left(x\right)=\csc\left(y\right)$

$\int\frac{2}{z\sqrt{z^2+11}}dz$

$3x+8y-xy=1$

$\frac{y^0\cdot y^{-1}\cdot\left(-y\right)^{-3}}{y^{-2}\cdot\left(-y\right)^2\cdot\left(-y\right)^{-2}}$

$3.0258+0.01267$

$73\cdot5$

$\frac{dy}{dt}=t^{-2}\left(sen2t-2ty\right)$