$\left(-6\right).5\left(-6\right).9-\left(-6\right).\left(10\right)$

$-13xy^2\left(-6xy\right)$

$\left(z+7\right)^3$

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

$2y\int\:\:xdx$

$\lim\:_{x\to\:0}\left(\frac{1-5x}{8x-1}\right)^{\frac{\tan\:\left(x^2\right)}{x^3}}$

$x^2+14x+28$