
LaTex Help Help with LaTex and writing math equations 
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September 13th, 2018, 06:43 AM  #1 
Banned Camp Joined: Mar 2015 From: New Jersey Posts: 1,720 Thanks: 125  Evaluation Symbol
How do you do this (evaluation symbol) with a tall bar, similar to integral? $\displaystyle {^{a}}_{a}$ Thanks Last edited by zylo; September 13th, 2018 at 06:46 AM. 
September 13th, 2018, 08:11 AM  #2 
Banned Camp Joined: Mar 2015 From: New Jersey Posts: 1,720 Thanks: 125 
$\displaystyle (xa)\biggr\rvert_{a}^{b}$ I figured it out using integration symbol as a model and looking up bigger vertical bar: "(xa)\biggr\rvert_{a}^{b}" 
September 13th, 2018, 10:15 AM  #3 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,663 Thanks: 2642 Math Focus: Mainly analysis and algebra 
$$\left. x + \cos x\right_a^b$$ Code: $$\left. x + \cos x\right_a^b$$ Code: $$\left. x + \frac{x^2}{2}\right_a^b$$ $$\left. \begin{aligned} x+y&=3 \\ xy&=1 \end{aligned} \right\} \implies \left\{ \begin{aligned} x &= 2 \\ y &= 1\end{aligned} \right.$$ Code: $$\left. \begin{aligned} x+y&=3 \\ xy&=1 \end{aligned} \right\} \implies \left\{ \begin{aligned} x &= 2 \\ y &= 1\end{aligned} \right.$$ Last edited by v8archie; September 13th, 2018 at 10:19 AM. 

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