$\int\frac{1}{x\sqrt{16x^2-100}}dx$

$\int\frac{5}{6}csc\left(\frac{2}{3}x\:+\:5\right)dx$

$\cos\left(x\right)\left(\sec\left(x\right)-\sin\left(x\right)\cdot\tan\left(x\right)\right)=\cos^2\left(x\right)$

$\lim_{x\to0}\left(\frac{1-sinx\cdot cosx}{1+sinx\cdot cosx}\right)^{\frac{1}{sinx}}$

$\int_x^{x+2}\left(4t+1\right)dx$

$x^3+x+2$

$\frac{2sec^2x-1}{secxtanx}$