$y\left(1+x^2\right)^{\frac{1}{2}}dy+x\sqrt{1+y^2}dx=0$

$3\left(x-8\right)\:<\:5x+6$

$\int\:\frac{e^{4x}}{\left(e^{2x}-1\right)^3}dx$

$24+4g$

$\left(1+cotx\right)\left(1-cotx\right)-csc^2x$

$\cot\left(\frac{\pi}{12}+x\right)=\tan\left(\frac{5\pi}{12}-x\right)$

$x^2-4x+2y=0$