写出下列中缀表达式的后缀形式：(1) A* - B + C (2) (A + B) * D + E / (F + A * D) + C (3) A && B|| ! (E > F) {注：按C++的优先级) (4) !(A && !( (B < C)||(C > D) ) )||(C < E)