1+2-(-3-4)+5+6-(-7)-(-8)-(+9)=
=1+2-(-7)+5+6+7+8-9=
=3+7+5+6+7+8-9=
=36-9=
=27
1+(-2)-(-3)-(-4)-5-6+7-8×(-9)=
=(-1)+3+4-5-6+7+72=
=6-5-6+7+72=
=(-5)+7+72=
=74
1-2-(-3)+4+5-(-67)+8+9=
=(-1)+3+4+5+67+8+9=
=93
(-1)-(-2)+34-(-56)-(-7+8-9)=
=(-1)+2+34+56-(-8)=
=35+56+8=
=99