Question

2+5-4+5+7+7+-6+6-9-6+5+5-5-6-7+8+1+3-3-1=

Answer 1

2+5-4+5+7+7+-6+6-9-6+5+5-5-6-7+8+1+3-3-1= 7

Answer 2

You answer is 7.

2+5+5+5+5-5+7+7-7-4-6+6-6-6+8-3+3+1-1-9
=2+5+5+5+7-4-6-6+8-9
=2+15+7-4-12+8-9
=10+15+7-16-9
=25+7-16-9
=9+7-9
=7

Hope it helps..