Show the Proof

import proveit
# Automation is not needed when only showing a stored proof:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%show_proof

	step type	requirements	statement
0	instantiation	1, 2, 3	⊢
	: , : , :
1	theorem		⊢
	proveit.core_expr_types.tuples.partition_front
2	instantiation	4, 5, 6	⊢
	:
3	instantiation	7, 8	⊢
	:
4	theorem		⊢
	proveit.numbers.number_sets.integers.nonneg_int_is_natural
5	instantiation	9, 10, 11	⊢
	: , :
6	instantiation	12, 13	⊢
	: , :
7	theorem		⊢
	proveit.numbers.addition.elim_zero_left
8	instantiation	35, 14, 15	⊢
	: , : , :
9	theorem		⊢
	proveit.numbers.addition.add_int_closure_bin
10	instantiation	35, 16, 29	⊢
	: , : , :
11	instantiation	17, 18, 19	⊢
	: , : , :
12	theorem		⊢
	proveit.numbers.addition.subtraction.nonneg_difference
13	instantiation	20, 21	⊢
	: , :
14	theorem		⊢
	proveit.numbers.number_sets.complex_numbers.real_within_complex
15	instantiation	35, 22, 23	⊢
	: , : , :
16	theorem		⊢
	proveit.numbers.number_sets.integers.nat_pos_within_int
17	theorem		⊢
	proveit.logic.sets.inclusion.unfold_subset_eq
18	instantiation	24, 25	⊢
	: , :
19	instantiation	26, 27	⊢
	: , :
20	theorem		⊢
	proveit.numbers.ordering.relax_less
21	instantiation	28, 29	⊢
	:
22	theorem		⊢
	proveit.numbers.number_sets.real_numbers.rational_within_real
23	instantiation	35, 30, 31	⊢
	: , : , :
24	theorem		⊢
	proveit.logic.sets.inclusion.relax_proper_subset
25	theorem		⊢
	proveit.numbers.number_sets.integers.zero_set_within_int
26	theorem		⊢
	proveit.logic.sets.enumeration.fold_singleton
27	theorem		⊢
	proveit.numbers.negation.negated_zero
28	theorem		⊢
	proveit.numbers.number_sets.natural_numbers.natural_pos_is_pos
29	instantiation	32, 33, 34	⊢
	: , :
30	theorem		⊢
	proveit.numbers.number_sets.rational_numbers.int_within_rational
31	instantiation	35, 36, 37	⊢
	: , : , :
32	theorem		⊢
	proveit.numbers.addition.add_nat_pos_closure_bin
33	assumption		⊢
34	theorem		⊢
	proveit.numbers.numerals.decimals.posnat1
35	theorem		⊢
	proveit.logic.sets.inclusion.superset_membership_from_proper_subset
36	theorem		⊢
	proveit.numbers.number_sets.integers.nat_within_int
37	theorem		⊢
	proveit.numbers.numerals.decimals.nat1