If you are going to type an equation in the middle of a paragraph, be sure that you respect the order of operations. It may be necessary to use more parentheses than you are used to. This is correct. I assume that you are all familiar with the set of real numbers. This is usually denoted with a bold face R .
R is an example of what is called a field .
Both are equivalent. The factorial operator is defined as follows. You might prefer to use superscripts for the exponents. The advantage of using MS Word 97 is that your mathematical formulas can be more complex because of the built in Equation Editor . To use the equation editor, select Object from the Insert menu.