一道数学题算24用3,-5,7,-13凑出24

1:(-5 × -13 + 7) ÷ 3
2:((-5 × -13) + 7) ÷ 3
3:(7 + -5 × 1-3) ÷ 3
4:(7 + (-5 × -13)) ÷ 3
5:(7 + -13 × -5) ÷ 3
6:(7 + (-13 × -5)) ÷ 3
7:(-13 × -5 + 7) ÷ 3
8:((-13 × -5) + 7) ÷ 3