((TeX R = 4\pi R^3))

((TeX x=\frac{-b±\sqrt{b^2 - 4ac}}{2b}))

((TeX G_{-1}(x,y)=x^{n-1}+x^n-1))

((TeX a = \frac{ \frac{ x+1 }{ y } }{ z+2 }))