– (+23) –(+56)+(-23)
2. (13-5)(-7-2)
3. [-3+7-(-4+6)] - [-8+(-6 -8)]
4. -{-8-[-4+(-4-7)]-34+(-2-3)}
5. |(-48)|- (-76) – (-14) -|-9-7|- (-67)
6. -2[-3+7-3(-4+6)]-[-8+3(-6-8)]