O: Operations on Numbers and Expressions

O1. Real numbers

O2. Complex numbers

O3. Algebraic expressions

E: Equations and Inequalities

E1. Linear equations and inequalities

E2. Nonlinear equations and inequalities

P: Polynomial and Rational Functions

P1. Quadratic functions

P2. Higher-order polynomial and rational functions

X: Exponential functions

X1. Exponential functions

F: Function Operations and Inverses

F1. Function operations and composition

F2. Inverse functions

F3. Piecewise functions