A math equation writer is a program that allows the user to input numbers and symbols to obtain an output of a function that is properly formatted. Most computer programs like Microsoft Word do not allow the user to use traditional mathematical formats.
An equation writer will enable the user to input various mathematics signs as well as variables such as the integral, square root symbol, superscript and even fractions. For example, an input such as frac(a)(b) will result in a/b. Most math teachers and textbook writers utilize equation writers to achieve the ideal equation for whatever problem they face.