1 + 1 + 1 + 1 + 1 - 5 + 2 + 2 + 2 + 2 + 2 - 10 + 1 - 1 + 0
= 1 x 5 - 5 + 2 x 5 - 10 + 1 - 1 + 0
= 5 - 5 + 10 - 10 + 1 - 1 + 0
= 0 + 10 - 10 + 1 - 1 + 0
= 10 - 10 + 1 - 1 + 0
= 0 + 1 - 1 + 0
= 1 - 1 + 0
= 0 + 0
= 0
1+1+1+1+1-5+2+2+2+2+2-10+1-1+0
=1 x 5 - 5 + 2 x 5 -10 +1 -1 + 0
=5 - 5 + 10 -10 +1 -1 + 0
=0+10-10+1-1+0
= 10 -10+1-1+0
=0+1-1+0
=1-1+0
=0