American Flag
The Olympic emblem can only be used to represent the Olympics
You could use a great many different symbols to represent sister. You could use a daisy for example to represent a sister.
There are many symbols that could be used to represent your work or career. A stethoscope for example could stand for work with medicine.
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Scientists use the symbol "u" to represent atomic mass unit.
There are an infinite number of symbols that can represent value or value creation. You could use a bird as a symbol for example.
they use the symbol n
symbol
a star
The Mayans
chemical symbol
If you are talking about math then its usually " x " but if that is already use in the expression and you want to use another symbol to represent a DIFFERENT number then you can use y or a or so on.