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 ExprTuple, alpha, beta, gamma, x, y
from proveit.linear_algebra import ScalarMult, VecAdd
from proveit.numbers import Mult
# build up the expression from sub-expressions
expr = ExprTuple(VecAdd(ScalarMult(Mult(alpha, beta), x), ScalarMult(Mult(gamma, alpha), y)), ScalarMult(alpha, VecAdd(ScalarMult(beta, x), ScalarMult(gamma, y))))
# 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")
# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())
stored_expr.style_options()
# display the expression information
stored_expr.expr_info()