Question

efectuati 1+{2+[3×(4+5)-6+7×8]-9}×

Answer 1

1 + {2 +[3 *(4 + 5) - 6 + 7 * 8] - 9} =
1 + {2 + [3 * 9 - 6 + 56] - 9} =
1 + {2 + [27 + 50] - 9} = 
1 + {2 + 77 - 9} =
1 + 70 = 
71

Answer 2

1+(2+(3x9-6+7x8)-9)
1+(2+(27-6+56)-9)
1+(2+(21+56)-9)
1+(2+77-9)
1+(79-9)
=1+70
=71