$\left(3x^2-9\right)\left(3x^2+9\right)$

$25-34-26-47+12+14$

$\int_y^{2y}\left(\frac{x^2}{2}y\right)dy$

$( x + 8 ) ( x - 3 )$

$\int\left(1-cscxcotx\right)dx$

$\frac{1}{1-cot\left(x\right)}=\frac{sin\left(x\right)}{sin\left(x\right)-cos\left(x\right)}$

$\frac{d}{dx}3x^3-2x^2+4x+23$