$\int\frac{28x^3\sec^2\left(7x^4\right)}{\tan\left(7x^4\right)}dx$

$\frac{5}{\sqrt[3]{x}}+1$

$\left(x+1\right)sqrt\left(e^x+1\right)$

$\int\left(\frac{2x^6+3x^4-5x-3}{x^3}\right)dx$

$8x^2+8xy-10y^2$

$\int\left(\frac{-x+5}{\left(x+2\right)\left(x+6\right)\left(x+5\right)}\right)dx$

$\left(x\:-\:15\right)\:\left(\:x\:-\:13\right)$