Order the list of numbers from small to large:

3.2 x 10^4
9.3 x 10^-7
-7.6 x 10^-9
1.9 x 10^7
5.7 x 10^13
4.5 x 10^4

-7.6 x 10^-9

9.3 x 10^-7
3.2 x 10^4
4.5 x 10^4
1.9 x 10^7
5.7 x 10^13