$169x^4-13x^2y^2+\frac{y^2}{4}$

$4a^4+8a^2a^2+9b^4$

$2w^3\left(3w^2+5w^6\right)$

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

$2x^2-30x+180$

$\int\frac{1}{1+3cos\left(x\right)}dx$

$3\cos^2\left(x\right)+\sin^2\left(x\right)+5\sin\left(x\right)=0$