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help > calc
syntax: calc <expression>

The calc command is a limited calculator that lets you
evaluate simple arithmetic expressions.

Expressions may contain numerals, the 4 basic operators, and
parentheses to specify the order of operations.
Note that numbers outside the range of -2,147,483,648 to
2,147,483,647 will give invalid results. (We're using a 32-bit
2's complement integer size, if that means anything to you)
You may now do exponents using "pow".
See examples for syntax.

calc 1 + 1
calc (3 * 7) / 5 + 2
calc 5 * pow(2,3) + 1