$\frac{d}{dz}\ln\left(\sqrt{\frac{a^2-z^2}{a^2+z^2}}\right)$

$\frac{1}{2}a+\frac{1}{3}b+2a-3b-\frac{3}{4}a-\frac{1}{6}b-\frac{1}{2}$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{13sec\left(x\right)}{15+7tan\left(x\right)}\right)$

$\int\:\:x^2\:3^{3x}dx$

$\frac{2x+4}{6}\ge\frac{x}{6}-3$

$f\left(x\right)=\frac{1}{5}\:x^3+3x^2+x+2$

$\int\left(\frac{\frac{5}{3}x^4}{\left(4-x\right)^{\frac{1}{5}}}\right)dx$