2013:(2+0+1)+3*(2-0-1+3)=?
2013:(2+0+1)+3*(2-0-1+3)=2013 ÷3 + 3×4 = 671 +12 = 683 2+0+1 = 3 2-0-1+3= 4 2013÷3 = 671 3×4= 12 671+12 = 683