$\left(3x^2y\right)\left(-9x^{-5}y^0\right)$

$\frac{3+\sin^2\left(x\right)}{\cos\left(x\right)-2}=3\cos\left(x\right)$

$\frac{d}{dx}x^2+xy-y^2$

$\left(5\right).\left(_{-3}\right)$

$\frac{2x^2+3x+1}{\frac{\sqrt{x-10}}{x}}$

$6x^2-116x+412=3x^2-68x+220$

$\left(7xy^2z+4\right)^2$