$8tan\left(x\right)+11=19$

$\left(4ab^2+xy\right)^2$

$\lim_{x\to0}\left(\frac{ln\left(3x+1\right)+sen\left(3x\right)}{3x^2}\right)$

$\frac{d^2y\left(x\right)}{dx^2}+y\left(x\right)=x^2sen\left(x\right)$

$\left(x-\left(4\sqrt{2}y\right)\right)^2$

$\left(4x^3-6x+5\right)\left(-3x^2+2x\right)$

$\sqrt[12]{12a}x\sqrt[3]{6a^2}$