$\left(y+z\right)^2-2\left(y+z\right)\left(a+y\right)+\left(a+y\right)^2$

$\int\:\frac{1}{x^2+7}dx$

$m\left(6m+20\right)$

$\int\left(t\left(4t+1\right)^4\right)dx$

$\frac{n^2}{2^n}x^n$

$\frac{1}{2}log\left(x\right)+4log\left(y\right)-4log\left(x\right)$

$\left(5a^2\:\:-\:4b^3\right)^2$