计算/f(G-j/d)i9](g5S
123×9+82×8+41×7-2009/f(G-j/d)i9](g5S
算式：提示*}:C.y6i1Q2_+{1I5R3}/f(G-j/d)i9](g5S
=/U0n*c/K0^,e)Y6|/f(G-j/d)i9](g5S