$\frac{dy}{dx}\left(-y+5x\right)$

$\left(8x^3\right)\left(3x^9\right)$

$\left(8a^5b-7x^2y^3\right)\left(8a^5b+7x^2y^3\right)$

$\cos\left(x\right)=-0.8$

$1\cdot\left(-27\right)$

$\int\frac{\left(4x-3\right)}{x^2\left(x-2\right)}dx$

$\left(-12\right)+\left(-15\right)-8+\left(-8\right)$