$10m^2-8n^2+7n^2+4m^2-3m^2-12n^2-14m^2+18n^2$

$^{12}\sqrt{\left(2^6a^6b^4\right)}$

$\int\frac{\sec^2\left(a\right)}{tan\left(a\right)+1}dx$

$\frac{-7-x}{-4}$

$\frac{d^3}{dx^3}\left(x^4-sen\left(x\right)\right)$

$\lim_{x\to\infty}\frac{2x^2-1}{5x+3}$

$\left(-3\right)^6.4^3.\left(-3\right)^8$