$5\left(5-\left(-4\right)\right)+5$

$\lim_{x\to\infty}\left(\frac{3x^2+x}{x^2+5x+6}\right)$

$\left(10-5-3+1\right)-\left(5-3+2\right)$

$\frac{sen^2x\:-\:cos^2x}{1-sen^2x}=\:tan^2x-1$

$\lim_{x\to0}\left(cos\left(3x\right)\right)^{\left(\frac{1}{x^2}\right)}$

$\left(3m+n^2\right)-\left(5x^3\right)^2$

$\frac{2\sqrt[4]{x-4}-4}{\sqrt[5]{x+12}-2}$