(1)? 1 4 + 5 6 + 2 3 ? 1 2 =- 3 12 + 10 12 + 8 12 - 6 12 = 1 2 ;(2)?23÷ 4 9 ×(? 2 3 )2=-8× 9 4 × 4 9 =-8;(3)(?125 5 7 )÷(?5)=25 1 7 ;(4)(-2)2+(-3)×[(-4)2+2]-(-3)2÷(-2)=4+(-3)×18-9÷(-2)=4-5.5.