$15x^8y^7-\:12\:x^{10}y^5$

$13x^2y^2+65x^3y$

$\sqrt{\left(1-\sin^2\left(b\right)\right)}\tan\left(b\right)=\sin\left(b\right)$

$8 x ^ { 3 } + 4 x ^ { 2 } + 2 x - 4$

$\left(\frac{sinx}{x}\right)^{11}$

$\int xb^{-3x}dx$

$\frac{\left(4x^3+5\right)^3}{\left(5x^3+2\right)^2}$