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math mode - vertical bar for absolute value and conditional expectation - TeX - LaTeX Stack Exchange
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math mode - "Evaluated at" bar for derivatives: \Bigr, \biggr, or \left...\right? - TeX - LaTeX Stack Exchange
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math mode - Derivatives: enter "evaluated at" vertical bar with multiple values as subscripts - TeX - LaTeX Stack Exchange
![math mode - vertical bar for absolute value and conditional expectation - TeX - LaTeX Stack Exchange math mode - vertical bar for absolute value and conditional expectation - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/xchBu.png)