\overline and \underline is not corrected

[retsyo]

latex2mathml renders

\overline{x+y} \qquad \underline{a+b}

as

but it should be

[retsyo]

\overbrace and \underbrace are same

[roniemartinez]

Can you add the Latex for \overbrace and \underbrace so I can test?

[retsyo]

\overbrace{1+2+\cdots+n}^{there are n}

and \underbrace{a+b+\cdots+z}_{26}

[roniemartinez]

latex2mathml output is correctly rendered in MathJax viewer. I created a separate ticket for \overbrace and \underbrace in https://github.com/roniemartinez/latex2mathml/issues/302