The algebra section allows you to manipulate mathematical expressions in all sorts of useful ways.
More specialized commands are on the way.
The term 'algebra' is used for many things in mathematics, but in this section we'll just be talking about the sort of algebra you come across at high-school. Algebra is the branch of elementary mathematics which uses symbols to stand for unknown quantities. The Algebra section deals only with algebraic expressions. These are mathematical statements which contain letters, numbers and functions, but no equals signs. The expand command is used mainly to rewrite polynomials with all brackets and whole number powers multiplied out and all like terms collected together.