看图列式。5F:^6T:M
5F:^6T:M
＋9j(k1_/@/l/a.i;L+X5F:^6T:M
－9j(k1_/@/l/a.i;L+X5F:^6T:M
算式：提示6d/N(@4F-y5F:^6T:M