$-\sin\left(x\right)-\cos\left(x\right)\cot\left(x\right)=\csc\left(x\right)$

$\frac{dy}{e^xdx}=\frac{x}{2y}$

$\frac{d^2}{dx^2}\left(\frac{8x^2-6x+11}{x^2-16}\right)$

$\int_0^{\infty}\left(x\cdot0.0006^{-0.0006x}\right)dx$

$\frac{4x+1}{3}\ge\frac{12x-3}{7}$

$8x^2\:+8xy-6y^2$

$( x ^ { 4 } - 4 y - c ^ { 2 } ) ^ { 2 }$