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 September 13th, 2018, 07:43 AM #1 Senior Member   Joined: Mar 2015 From: New Jersey Posts: 1,603 Thanks: 115 Evaluation Symbol How do you do this (evaluation symbol) with a tall bar, similar to integral? $\displaystyle {|^{a}}_{-a}$ Thanks Thanks from topsquark Last edited by zylo; September 13th, 2018 at 07:46 AM.
 September 13th, 2018, 09:11 AM #2 Senior Member   Joined: Mar 2015 From: New Jersey Posts: 1,603 Thanks: 115 $\displaystyle (x-a)\biggr\rvert_{a}^{b}$ I figured it out using integration symbol as a model and looking up bigger vertical bar: "(x-a)\biggr\rvert_{a}^{b}"
 September 13th, 2018, 11:15 AM #3 Math Team   Joined: Dec 2013 From: Colombia Posts: 7,502 Thanks: 2511 Math Focus: Mainly analysis and algebra $$\left. x + \cos x\right|_a^b$$ Code: $$\left. x + \cos x\right|_a^b$$ $$\left. x + \frac{x^2}{2}\right|_a^b$$ Code: $$\left. x + \frac{x^2}{2}\right|_a^b$$ It works for any type of bracket. \left. \begin{aligned} x+y&=3 \\ x-y&=1 \end{aligned} \right\} \implies \left\{ \begin{aligned} x &= 2 \\ y &= 1\end{aligned} \right. Code: \left. \begin{aligned} x+y&=3 \\ x-y&=1 \end{aligned} \right\} \implies \left\{ \begin{aligned} x &= 2 \\ y &= 1\end{aligned} \right. \left \right pairs must be matched. Thanks from zylo Last edited by v8archie; September 13th, 2018 at 11:19 AM.

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