$17x^{14}y-71xy^{15}$

$\left|-6\right|\cdot\left(7-11\right)+\left(-5\right)\cdot\left(5\cdot\left(8-2\right)-4\cdot\left(9-4\right)\right)$

$21-\left(3-10+11+6\right)$

$\int\left(5x^3+6x\right)e^xdx$

$\int\left(x\right)^5\cos\left(3x\right)dx$

$\left(x^3+x^2-7x+2\right)-\left(x-2\right)$

$\left(4x^2y^3\right)^{\frac{1}{2}}\left(2x^2y^{\frac{1}{2}}\right)^{-2}$