# Evaluation Symbol

#### zylo

How do you do this (evaluation symbol) with a tall bar, similar to integral?

$$\displaystyle {|^{a}}_{-a}$$

Thanks

Last edited:
1 person

#### zylo

$$\displaystyle (x-a)\biggr\rvert_{a}^{b}$$

I figured it out using integration symbol as a model and looking up bigger vertical bar:

"(x-a)\biggr\rvert_{a}^{b}"

#### v8archie

Math Team
$$\left. x + \cos x\right|_a^b$$
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.

Last edited:
1 person