$0.5-\left(-10.5\cdot5\right)+40.5$

$\int\left(\cot^2\left(2\pi\right)\right)dx$

$x=secy$

$4sen^3x\:+\:12\:cosx\:sen^3x\:+\:20\:tan^2\:sen^2x$

$9x^4-1$

$\lim_{x\to\frac{1}{2}}\left(\left(1-2x\right)\left(tan\left(\left(\pi\right)\left(x\right)\right)\right)\right)$

$\left(625^4x\:2^4\right)\::\:25^4$