$\int\:\:x^2\left(x^3+6\right)^3dx$

$\left(14abc-2d\right)^2$

$y'\:+\:4y\:=\:12sin\left(x\right)$

$\int\left(6x^3e^{6x^4}\right)dx$

$4x^2\:+\:6xy\:-\:3x\:+\:8yx\:-\:9x^2$

$\frac{9}{25}p^6+\frac{2}{15}p^3q^4+\frac{1}{81}q^8$

$\int\frac{1}{\sqrt{x}\left(2+\sqrt{x}\right)^7}dx$