$x^2\:+16^2+\:64\:\:$

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

$2\cdot senx+1=3\cdot cscx$

$\left(\frac{1}{\sec}+\frac{1}{\cos}\right)$

$3x+4\le2x+6$

$2x\left(n-1\right)-3y\left(n-1\right)$

$\left(4a^3-5b^2\right)^4$