Simplification Questions, Formulas, Shortcuts and Practice Problems Rule of Simplification In simplifying an expression, first of all vinculum or bar must be removed. For example: we know that -4-5 = -9 but, - = -(- 1) = 1 After removing the bar, the brackets must be removed, strictly in the order (), {} and []. After removing the brackets, we must use the following … [Read more...] about Simplification Questions, Formulas, Shortcuts and Practice Problems