Latex Ref Test: x2, x3, \nearrow, \sqrt[]{}8

[Gringo123]

x²
x³
x²
\nearrow
\sqrt[]{}8

 

[HallsofIvy]

x²
x³
x²
\nearrow
\sqrt[]{}8

For just square root (as opposed to cube root, etc.) you don't need the "[ ]". And the 8, assuming it is supposed to be in the square root goes inside the braces:

\sqrt{8} gives \sqrt{8}

\sqrt[3]{8} gives \sqrt[3]{8}