She looked at him curiously - at his ugly tweed suit, his yellow boots, and up into the strong, forceful face with eyes set in deep hollows under his protruding brows, at the heavy jaws giving a certain coarseness to his expression, which his mouth and forehead, well-shaped though they were, could not altogether dispel.
Definition of Expression. An Expression is a mathematical phrase that combines numbers and/or variables using mathematical operations. An expression is a representation of a value; for example, variables and/or numerals that appear alone or in combination with operators are expressions.
Share to: An expression in mathematics is simply a statement-it is not equal to anything. For example, x + 3 is an expression because we are not told what it is equal to, it is just â¦ a statement. Expressions require variables (like x or y) in order to be of any interest to mathematicians.