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Yes, there are more operators and functions than we can fit here, from the scalar .. operator to the scalar , operator, from wantarray to goto(!), from caller to chr. See the perlop and perlfunc manpages.
The tr/// operator looks like a regular expression, but it's really for transliterating one group of characters into another. It can also efficiently count selected characters. See the perlop manpage.
Here documents are a useful form of multiline string quoting; see the perldata manpage.
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| B.7. Databases |  | B.9. Mathematics |
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