$-16<x^2$

$4x+\left(-5x\right)-\left(6x+3y\right)-y$

$\left(a^3x+a^3-4a^2x^3\right)$

$\sin\left(-\pi\right)+\cos\left(-\pi\right)$

$\left(8x^4+5y^3\right)^2=64x^8+80x^4y^3+25y^6$

$\int\left(sin\left(30t-30x\right)\right)dx$

$\frac{d}{dx}\left(\sqrt{x}-\sqrt{y}-xy\right)=\frac{d}{dx}5$