$\frac{y+4}{3y-9}$

$\int\frac{19}{x^3-125}dx$

$\left(4x+y^3\right)^4$

$x+5=x+3$

$sin\left(x\right)cos^2\left(y\right)dx-cos\left(x\right)sin\left(y\right)dy=0$

$\lim_{x\to\frac{\pi}{4}}\left(\frac{tan\left(x\right)-1}{\frac{1}{csc\left(2x\right)}}\right)$

$\int2x\left(x-3\right)dx$