Function eval_base_expr 

pub fn eval_base_expr<F, EF>(
    expr: &SymbolicExpression<F>,
    inputs: &[EF],
    layout: &InputLayout,
    periodic_values: &[EF],
) -> EF
where
    F: Field,
    EF: ExtensionField<F>,

Evaluate a base-field symbolic expression at concrete inputs.