An expression is a tool by which you make an impression at the time when you get the opportunity to express yourself conciously/ unconciouly to others. And this expression of yours...
A mathematical expression does not have an answer, if it is algebraic and all of the terms are unlike. For example, x+7y does not have an answer because there are no definite solutions, and there is...
The "World's Smallest Violin" expression was first used when a T. Rex first played it for the rest of the dinosaurs when they were facing extinction. Of course, the T. Rex, being the king of all...