Take the variable expression and split each part into separate components. Each variable, operator and constant should be isolated. This allows for the translator to look at each piece of the expression one at a time.
Convert each part of the variable expression into a word. For example, a "+" sign becomes "sum," a "-" becomes "difference," an "x" becomes "product," a "/" becomes "quotient," and a "^2" becomes "squared." The variables are already in word form and cannot be translated.
Put the words back together to form a verbal expression. Ensure that the order of the words is correct. For example, a verbal expression should read "the product of a and b" rather than "a product b."