$\left(5n^2+6\right)^2$

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

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

$5\left(x^3+x^2-3\right)-2\left(2x^3-2x^2\right)$

$\left(3x^2y^2+2xy\right)dx+\left(2x^3y+x^2\right)dy=0$

$\sec\left(\frac{\sqrt{7}}{4}\right)^2+cos\left(x\right)^2=1$

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