$\left(5\cdot\left(\sin^2\left(x\right)\right)\right)-\left(9\cdot\left(\sin\left(x\right)\right)\right)-2$

$3y^{3}+6y+2y+y^{2}$

$y^5-9y^3+6y^2-31-11y^4+31y^3-8y^2-19y$

$\left(8a^2-5b^3\:\right)^2$

$\frac{69}{2}-8lnx=50$

$\frac{\left(\left(3a+5\right)x^2-2bx^2+6x+3\right)}{x+1}$

$\int\left(2x\left(3x^2-2\right)^3\right)dx$