L30_A 8.3 Powers and products of Trigonometric functions (續.三角函數的次數和乘積) Part II: Other trigonometric functions (Conti.) L30_B 8.4 Integrals involving √a2±x2, √x2-a2; trigonometric substitution (三角替代法) L30_C 8.5 Partial Fractions (部分分式)