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                      The four basic operations

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                      Basic operations
                      Addition
                      Subtraction
                      Multiplication
                      Division

                      You can use multiple symbols for multiplication: * asterisk, · middle dot, the one in the menu, and also space. That's it; a space between variables or numbers is an implicit multiplication. The * asterisk is automatically converted to a nicer middle dot ·. About division, apart from the symbol in the menu, you can also use / slash and, of course, the fraction symbol.

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