about in mathematical terms mean to round!
In mathematical terms it's called a rhombus.
They are placed largest to smallest.
Putting two objects together is consider summing them. Summing mathematical terms is considered addition because you are adding another term or number to another.
Putting a question mark at the end of a bunch of mathematical terms does not make it a meaningful question.
Each power should appear only once (for example, only one term which contains x cubed); the powers should be in descending order.
It means "a Mathematical Expression".
4n3 - 12n2 - 7n + 9
There is no answer since the terms of an equation can be written in any order (when in ordinary mathematical domains).