<s> """<STR_LIT>""" <EOL> from . sympify import sympify , SympifyError <EOL> from . cache import cacheit <EOL> from . basic import Basic , Atom , preorder_traversal <EOL> from . singleton import S <EOL> from . expr import Expr , AtomicExpr <EOL> from . symbol import Symbol , Wild , Dummy , symbols , var <EOL> from . numbers import Number , Float , Rational , Integer , NumberSymbol , RealNumber , igcd , ilcm , seterr , E , I , nan , oo , pi , zoo , AlgebraicNumber , comp , mod_inverse <EOL> from . power import Pow , integer_nthroot <EOL> from . mul import Mul , prod <EOL> from . add import Add <EOL> from . mod import Mod <EOL> from . relational import ( Rel , Eq , Ne , Lt , Le , Gt , Ge , <EOL> Equality , GreaterThan , LessThan , Unequality , StrictGreaterThan , <EOL> StrictLessThan ) <EOL> from . multidimensional import vectorize <EOL> from . function import Lambda , WildFunction , Derivative , diff , FunctionClass , Function , Subs , expand , PoleError , count_ops , expand_mul , expand_log , expand_func , expand_trig , expand_complex , expand_multinomial , nfloat , expand_power_base , expand_power_exp <EOL> from . evalf import PrecisionExhausted , N <EOL> from . containers import Tuple , Dict <EOL> from . exprtools import gcd_terms , factor_terms , factor_nc <EOL> from . evaluate import evaluate <EOL> Catalan = S . Catalan <EOL> EulerGamma = S . EulerGamma <EOL> GoldenRatio = S . GoldenRatio </s>
