Question

{2-3-[(-5+7-6)-8-(5-6+8)]}+[(-5+6-12)-(-8)] suma y resta de signos

Answer 1

{2-3-[(-5+7-6)-8-(5-6+8)]}+[(-5+6-12)-(-8)]
realizamos operaciones de adentro hacia afuera:
= {2-3-[(-4)-8-(7)]} + [(-11)-(-8)]
= {-1 - [-4 - 8 -7]} +[-11 + 8]
= {-1 + 19} + [-3]
= {18} - 3
= 15