How to make parentheses (with labels J1 and J2) as shown on the picture below?

Example of parentheses under math formulae


You can use \underbrace:

a = \underbrace{a + b}_{=c}


enter image description here

Additionally, as stated in the comments, put the whole thing in braces to get the spacing before and after right:

a = x + {\underbrace{a + b}_{=c}}
  • 1
    +1. Hint: Enclose the entire underbrace expression in curly braces -- like {\underbrace{a + b}_{=c}} -- so that it'll be treated as a math-ord rather than as a math-op object. (This is relevant for the spacing before and after the underbrace expression.
    – Mico
    Mar 7 '16 at 16:51
  • +1 for this comment. Although the question was so basic, the terms math-ord and math-op are probably not understood... ;)
    – Dux
    Mar 7 '16 at 16:54

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.