class_docstr: Represents a rational plus or minus some amount
  of arbitrary small deltas.
class_docstr_tok: ["Represents","a","rational","plus","or","minus","some","amount","of","arbitrary","small","deltas","."]
code: def __getitem__(self, index):
      return self.value[index]
  
imports: from sympy.solvers.solveset import linear_eq_to_matrix
  from sympy.matrices.dense import eye
  from sympy.assumptions import Predicate
  from sympy.assumptions.assume import AppliedPredicate
  from sympy.assumptions.ask import Q
  from sympy.core import Dummy
  from sympy.core.mul import Mul
  from sympy.core.add import Add
  from sympy.core.relational import Eq, Ne
  from sympy.core.sympify import sympify
  from sympy.core.singleton import S
  from sympy.core.numbers import Rational, oo
  from sympy.matrices.dense import Matrix
label_desc: Use image node_id 8 for calling the LRARational obj's underlying member method code with example usage: obj.__getitem__(index) and returns: self