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	reference	4	⊢
2	instantiation	4, 5, 6	⊢
	: , : , :
3	instantiation	15, 18, 16, 20	⊢
	: , : , : , : , : , : , :
4	theorem		⊢
	proveit.logic.equality.sub_left_side_into
5	instantiation	7, 17, 16, 8, 9	⊢
	: , : , : , : , :
6	instantiation	10, 11, 12	⊢
	: , : , :
7	theorem		⊢
	proveit.logic.sets.enumeration.proper_subset_of_superset
8	instantiation	22	⊢
	: , :
9	assumption		⊢
10	axiom		⊢
	proveit.logic.equality.equals_transitivity
11	instantiation	15, 18, 16, 13, 20, 14	⊢
	: , : , : , : , : , : , :
12	instantiation	15, 16, 17, 18, 19, 20	⊢
	: , : , : , : , : , : , :
13	theorem		⊢
	proveit.numbers.numerals.decimals.nat3
14	instantiation	21	⊢
	: , : , :
15	theorem		⊢
	proveit.logic.sets.enumeration.reduction_right
16	theorem		⊢
	proveit.numbers.numerals.decimals.nat1
17	theorem		⊢
	proveit.numbers.numerals.decimals.nat2
18	axiom		⊢
	proveit.numbers.number_sets.natural_numbers.zero_in_nats
19	instantiation	22	⊢
	: , :
20	theorem		⊢
	proveit.core_expr_types.tuples.tuple_len_0_typical_eq
21	theorem		⊢
	proveit.numbers.numerals.decimals.tuple_len_3_typical_eq
22	theorem		⊢
	proveit.numbers.numerals.decimals.tuple_len_2_typical_eq