SQL & PL/SQL :: Calculate Difference Between Multiple Numbers

I need to subtract multiple numbers to get the difference between each numbers, the amount of numbers to subtract between each others can vary between 2 and 10.

create table table_1 (
col1 varchar2(5),
col2 number(6,0),
col3 number(12,0)
)

insert into table_1 values ('AAA', 34379, 11111);
insert into table_1 values ('AAA', 39032, 11111);
insert into table_1 values ('AAA', 54337, 11111);
insert into table_1 values ('AAA', 78005, 11111);

insert into table_1 values ('AAA', 66793, 22222);
insert into table_1 values ('AAA', 74323, 22222);
insert into table_1 values ('AAA', 81426, 22222);

Expected Output:

col1 col2 col3
AAA -4653 11111
AAA -15305 11111
AAA -23668 11111
AAA -7530 22222
AAA -7103 22222