Special identity
The cube of a term, the square of this term times the other term multiplied by 3, the square of the other term multiplied by the first term and by 3 plus the cube of the other term is the same as the cube of the sum of the two terms.
The cube of a term, the square of this term times the other term multiplied by 3, the square of the other term multiplied by the first term and by 3 plus the cube of the other term is the same as the cube of the sum of the two terms.