1 + 1 = ?, 1+1 =, 1 +1 =?, 1+1=?, 1 + 1, 1+1=, 1*1, 1 =1, 1-1, 1+ 1=, 1 + 1 =, 1+1 = ?, (1;1), 1 + 1 =?, 1+1=????, 1 : 1, 1 +1 = ?, 1+ 1, 1+1= , 1+1=.., (1;−1), -1; 1