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I try making my second pair of parenthesis bigger to match the picture using:

$$= p+(1-p)\left(1+ \mathbf E [X]\right)$$

par

Somehow, that doesn't work. Can someone point out my error?

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    note you should not use $$ in latex, there is no reason to enlarge the () here and latex does not by default but you could use \bigl(1+...\bigr) to force a larger size – David Carlisle Jan 10 at 17:46
  • @DavidCarlisle, I am using MathJax actually. – J. Doe Jan 10 at 18:02
  • Amazing! Your solution works! Thanks. – J. Doe Jan 10 at 18:03
  • even with mathjax \[ rather than $$ is the default – David Carlisle Jan 10 at 18:05
  • @DavidCarlisle Not really. For instance, in Math.SE one has to use $$. Or \\[ and \\] – egreg Jan 10 at 18:17
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Note you should not use $$ in latex, there is no reason to enlarge the () here and latex does not by default but you could use

\bigl(1+...\bigr)

to force a larger size

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  • Thank you! I was copying from a note, and wish to match the original text as much as possible. – J. Doe Jan 11 at 7:18
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A similar answer is in the following link. You can choose between the following options: \bigl, \Bigl and \Biggl . For example

\begin{equation}
    \Biggl( \Bigl( \bigl((a+b)^2\bigr)^2 \Bigr)^2 \Biggr)^2
\end{equation}

the output is:

output example

more Brackets and Parentheses in link enter image description here

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    There's also \vert and \Vert, which end up being | and ||, respectively. The advantage of the former is that there's also \lvert, \rvert, \lVert, and \rVert, which end up being | and ||, but having the appropriate interpretation of "left/right delimiter" which helps with the spacing. – Teepeemm Jan 10 at 20:57
  • Thank you for a barrage of an answer, gent! – J. Doe Jan 11 at 7:19

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