$\left(x^2+27\right)\left(x^2-7x+49\right)$

$\left(3x^3-\frac{1}{2}x^2+2x-1\right)+\:\left(-\frac{1}{4}+2x^2-5x^3\right)$

$x-42=13$

$\frac{d}{dx}\left(2y-x+xy\right)$

$\int2abx^3dx$

$\left(-x^7y^{0.5}-4a^4b\right)^4$

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