1. Series, Complex Numbers, Trigonometric Function Synthesis 2 Sine and Cosine Theorem, Plane Basic Geometry Trigonometric Synthesis (Most Application Problems) 3 Analytic Geometry (Line and Curve Synthesis) 4 Solid Geometry (Space Vector Inserts More) 5 Functions (This point is bigger, so I won't go into details) 6 Derivative to find slope and linear equation (point-oblique type).