$\int\frac{1x+1}{x^2\left(x-1\right)^3\left(x^2+4\right)}dx$

$\int x^2\sqrt[3]{x+2}dx$

$\lim\:_{x\to\:0}\left(1+3x\right)^{\frac{1}{senx}}$

$\frac{20x^3-8x^2y}{4x^2}$

$b\sqrt{a^2c}+\sqrt[4]{16a^6b^4c^2}-a\sqrt[6]{b^6c^3}$

$\lim_{x\to0}\left(\frac{1}{x^4+2x^2}\right)$

$\int6x^2e^{x^3-1}dx$