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I am typing my summer report in overleaf and overleaf gives us to select from various kinds of projects (as an already made up format) and I selected Wright State Univ Thesis report format. Now in its preamble it is showing package \amssymb but when I type \rtimes it shows undefined control sequence. How can I fix this?

Here I am attaching the pic which shows the preamble- enter image description here

Plese tell me how can I use \amssymb as typing so many math symbols is getting impossible without it, now. I am 30% complete, so cannot rewrite it.

P.S.- I do note have any experience with latex and I am new to it.

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    all the \usepackage lines in the preamble are commented out -- preceded by a % sign. remove the % sign and try again. a commented-out package won't be loaded; the commenting is probably done here so that these packages are only suggestions; not all users may need all these packages, but the ones listed in comments are probably known to work, so a user starting a new project doesn't have to go exploring. – barbara beeton Jul 16 '15 at 15:10
  • That template makes some really bad, out-dated suggestions: be careful what you uncomment! – cfr Sep 6 '15 at 0:17
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all the \usepackage lines in the preamble are commented out -- preceded by a % sign. remove the % sign and try again.

a commented-out package won't be loaded.

the commenting is probably done here so that these packages are only suggestions; not all users may need all these packages, but the ones listed in comments are probably known to work, so a user starting a new project doesn't have to go exploring.

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