What are expressions, terms factors coefficients, number line and an expression, monomial, binomial, trinomial, polynomials, addition of algebraic expression, subtraction of algebraic expression, multiplication of monomial, binomial, polynomials, multiplication of a polynomial by a polynomial, multiplication of a binomial by a trinomial, simplify the expressions and evaluate them as directed, multiplication of binomials, standard identities, applying identities and solving problems, using identities and evaluating it