计算6y7L,n)n6I9f1?4`
67×12+67×35+67×52+676y7L,n)n6I9f1?4`
算式：提示8B2a'?.d.l6y-V+C6i6y7L,n)n6I9f1?4`
=/j)V1S.d9d;O*S:m;w+?*f.y8`6y7L,n)n6I9f1?4`