Question

-11 + (13) - (-9)= , 37 -[42-(18-48)]-34= , -3 -[7+(6-8)]-1= , 5-{-3-[-1-(5+8)]+6}-6

Answer 1

-11+13+9=
    2+9=  
      11
37-|42-(-30)-34=

37-|42+30|-34
37-72-34
-69


-3-|7+(-2)|-1
-3-|7-2|-1
-3-5-1
  -9
5-|-3-|-1-(13)|+6|-6
5-|-3|-14|+6|-6
5-|-3-14!+6|-6
5+17|+6-622