$\int\left(\frac{25-x^2}{\sqrt{x}}\right)dx$

$\lim_{x\to0}\left(x^2\ln\left(\cos\left(\frac{1}{x}\right)\right)\right)$

$\left(9z+12\right)-\left(6z+8\right)$

$7m+5\left(-2m+7\right)$

$40\left(1.5\right)^6$

$x^3\sqrt{x}^4-1$

$\left(3x+4y\right)^2-\:\left(3x-4y\right)^2$