15x-8.6=21.46c+]2~'y3q:s8q+k
算式:提示;w,N+M8M5v4E7E3X'@+J/Z4C(J0q6c+]2~'y3q:s8q+k
x='d*F:|'w,k4D6|/`6c+]2~'y3q:s8q+k