foo(1.0)
1.0
bar(2, 3.0, 4)
3.0
5.0
5.0
foo2(1.0)
1.0
foo3(foo2(1.0))
1.0
bar2(2, 3.0, 4)
3.0
5.0
5.0
bar_foo2(6, foo2(7.0), 8)
7.0
bar_foo3(6, foo3(foo2(7.0)), 8)
7.0