1)
2)
3-(4×(3-2×1)-(-2+1))=3-(4×1+1)=-2
3)
4)
6-7×(3-2-(3-2×(4-5)))=6-7×(3-2×(-1))=6-7×(3-2-(3+2))=6-7×(3-2-5)=6-7×(-4)=6+28=34
1)
2)
3-(4×(3-2×1)-(-2+1))=3-(4×1+1)=-2
3)
4)
6-7×(3-2-(3-2×(4-5)))=6-7×(3-2×(-1))=6-7×(3-2-(3+2))=6-7×(3-2-5)=6-7×(-4)=6+28=34