How to | Change the Form of Input and Output
The user interface for Mathematica provides many options for formatting input and output.
The sum of from to is :
While correct, this does not look like traditional mathematics. Select the cell group, then choose the menu item ►►:
Alternatively, if you only want to format the answer, apply TraditionalForm:
InputForm and StandardForm work in reverse.
Use InputForm to find out how to type an expression into Mathematica:
StandardForm is more compact than InputForm and is unambiguous to Mathematica:
TraditionalForm is sometimes ambiguous; in this case, Mathematica treats first as a number and then as a function: