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Original Message (ID '148487') By yehuda:
I assume that you didn't forget to evaluate the cell containing the assignments In case you did a=5;b=3; Then SHIFT+RETURN (or enter on the numeric key-pad if you are on a desktop) the evaluation is what makes Mathematica be aware of your assignments then a^b SHIFT + ENTER and you are done "a^b" is a string and will printout on an output cell as such another thing to check - see if you are using an input cell for your assignments yehuda