$\tan^2\left(y\right)+\sec^2\left(y\right)$

$\frac{d}{dx}\left(ln\left(\frac{\left(4x+1\right)^2}{\sqrt{\left(x^2+1\right)}}\right)\right)$

$\left(-4m^xn^y\right)\left(-5m^2n^2\right)$

$18x^2-16x+11$

$\lim_{x\to\infty}\left(\frac{2^{3-x}}{x^3-x^2-1}\right)$

$y^3=x^2+2x+1$

$\left(x+6\right)\left(x+2\right)+\left(x+4\right)\left(x+1\right)-2x^2$