-56 - (-34) = -56 - -34
if 2 + or - signs are so close to that you can put a circle around them without anything being in the way then,
if the signs are the same replace with a + that is ++=+ , and - - = +
if the signs are opposites replace with a - that is - + = - , and + - = -
you have 2 minuses so replace with a +
-56 + 34
+118654 
