$7\left(2t-6\right)+-3\left(5t-5\right)$

$\frac{\left(\left(\sqrt[3]{\left(x+h\right)^2}\right)-\sqrt[3]{x^2}\right)}{h}$

$-11mn\:-2mn$

$\frac{\left(12xy^5\right)^3\left(16x^2y^2\right)}{\left(8x^3y^3\right)\left(3x^5y\right)}$

$\lim_{x\to\infty}\left(\frac{2e^x+\ln\left(x\right)}{e^x-4x+2}\right)$

$\:\left(a+b\right)-5\left(a+b\right)\:-7\:$

$-x=25$