Algebraic Expressions

1. Linear Expressions
e.g. 2x, -1/4x+2, 0.5x - 100
General form: ax+b

2. Quadratic Expressions 
e.g. 3x^2, 4x^2 + x, -6x^2+4
General Form: ax^2 +bx+c

3. Cubic Expressions
e.g. 2x^3, 3x^3+6x
General Form: ax^3+bx^2+cx+d

4. Quartic Expressions
e.g. 3x^4+6x^3+7
general form: ax^4+bx^3+cx^2+dx+e