Expression of type ExprTuple

from the theory of proveit.numbers.addition

import proveit
# Automation is not needed when building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_expr # Load the stored expression as 'stored_expr'
# import Expression classes needed to build the expression
from proveit import ExprRange, ExprTuple, IndexedVar, Variable, a, b, c, n
from proveit.core_expr_types import a_1_to_n
from proveit.numbers import Add, Neg, one, subtract, two

# build up the expression from sub-expressions
sub_expr1 = Variable("_a", latex_format = r"{_{-}a}")
sub_expr2 = Neg(c)
sub_expr3 = ExprRange(sub_expr1, IndexedVar(a, sub_expr1), one, subtract(n, two))
expr = ExprTuple(Add(Add(a_1_to_n, b), Add(sub_expr2, Add(sub_expr3))), Add(a_1_to_n, b, sub_expr2, sub_expr3))

expr:

# check that the built expression is the same as the stored expression
assert expr == stored_expr
assert expr._style_id == stored_expr._style_id
print("Passed sanity check: expr matches stored_expr")

Passed sanity check: expr matches stored_expr

# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())

\left(\left(a_{1} +  a_{2} +  \ldots +  a_{n} + b\right) + \left(-c + \left(a_{1} +  a_{2} +  \ldots +  a_{n - 2}\right)\right), a_{1} +  a_{2} +  \ldots +  a_{n} + b - c+ a_{1} +  a_{2} +  \ldots +  a_{n - 2}\right)

stored_expr.style_options()

name	description	default	current value	related methods
wrap_positions	position(s) at which wrapping is to occur; 'n' is after the nth comma.	()	()	('with_wrapping_at',)
justification	if any wrap positions are set, justify to the 'left', 'center', or 'right'	left	left	('with_justification',)

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	ExprTuple	1, 2
1	Operation	operator: 21 operands: 3
2	Operation	operator: 21 operands: 4
3	ExprTuple	5, 6
4	ExprTuple	9, 10, 11, 16
5	Operation	operator: 21 operands: 7
6	Operation	operator: 21 operands: 8
7	ExprTuple	9, 10
8	ExprTuple	11, 12
9	ExprRange	lambda_map: 17 start_index: 18 end_index: 25
10	Variable
11	Operation	operator: 28 operand: 15
12	Operation	operator: 21 operands: 14
13	ExprTuple	15
14	ExprTuple	16
15	Variable
16	ExprRange	lambda_map: 17 start_index: 18 end_index: 19
17	Lambda	parameter: 27 body: 20
18	Literal
19	Operation	operator: 21 operands: 22
20	IndexedVar	variable: 23 index: 27
21	Literal
22	ExprTuple	25, 26
23	Variable
24	ExprTuple	27
25	Variable
26	Operation	operator: 28 operand: 30
27	Variable
28	Literal
29	ExprTuple	30
30	Literal