$\left(8\cdot20\right)-\left(8\cdot10\right)$

$\int2x^2e^{x^3-1}dx$

$sen\left(x\right)-2cos\left(x\right)cot\left(x\right)=csc\left(x\right)$

$f\left(x\right)=\left(\frac{2x-1}{x+1}\right)^2$

$4\sin\left(x\right)^2-5\cos\left(x\right)\tan\left(x\right)-6=0$

$\left(3^5\right)^7$

$\frac{dy}{dx}=\left(4-y\right)\left(4-2y\right)^2$