$\int x^2\left(5-x\right)^4dx$

$\int5x^3\sqrt{3-x^2}dx$

$\left(12x^2+2y^3\right)\left(12x^2-2y^3\right)$

$f\left(x\right)=\frac{\left(\left(x^2-16\right)\right)}{\left(x-4\right)}$

$\int_{\frac{\pi}{4}}^{\frac{\pi}{2}}\left(\csc^2\left(x\right)\right)dx$

$2\cdot\:\sqrt{3}\cdot\:\:sen\left(2\cdot\:\:x+\frac{\pi\:}{2}\right)+cos^2\left(\frac{\pi}{2}+x\right)=1$

$x - 9 = 1$