Mathematics

1. Expression

1.1. Types

1.1.1. numerical expresion

1.1.2. variable expression

1.2. Simplifying expresions

1.3. evaluating expresions

1.3.1. Substitution

1.4. Terms

1.5. Has no equal sign

2. Substituting

2.1. we evaluate an expression

2.2. the order of operation is the some as for BIDMAS

2.3. removing brackets

2.4. TERM

2.5. Every term inside the brackets must be multiplied by the term outside the bracket

3. BIDMAS

3.1. Brackets

3.2. Indices

3.3. Division

3.4. Multiplication

3.5. Addition

3.6. Subtraction

4. Equation

4.1. Mathematics sentence