-Simple operation of 1-2-3 + 4 + 5 + 6-7-8-9 + 10 + 11 + 12 -. - 31-32-33 + 34 + 35 + 36 Quick, right away, good points! What seas, Straits and canals does a warship go through from the east coast of the United States to the Persian Gulf

-Simple operation of 1-2-3 + 4 + 5 + 6-7-8-9 + 10 + 11 + 12 -. - 31-32-33 + 34 + 35 + 36 Quick, right away, good points! What seas, Straits and canals does a warship go through from the east coast of the United States to the Persian Gulf

-1-2-3+4+5+6-7-8-9+10+11+12-.-31-32-33+34+35+36
=(-1-2-3+4+5+6)+(-7-8-9+10+11+12)-.+(-31-32-33+34+35+36)
=9*6
=54