$\sin\left(x\right)dx=x^4\tan\left(x\right)\cos\left(x\right)dz$

$\int\left(1+x\right)^2e^{2x}dx$

$x^5-12x^4-9x^3-48x^2-52x$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{10cosx}{1-sinx}\right)$

$-8-\left(5-1\right)$

$\left(x^2-2y^3+2z^4-8\right)-\left(-17+x^2-2y^3+3z^4\right)$

$\int\frac{sen\left(x\right)cos\left(x\right)}{1-sen\left(x\right)}dx$