diff --git a/mathics/eval/arithmetic.py b/mathics/eval/arithmetic.py
index 9b512ade3..37c24267d 100644
--- a/mathics/eval/arithmetic.py
+++ b/mathics/eval/arithmetic.py
@@ -32,24 +32,18 @@
 from mathics.core.element import BaseElement, ElementsProperties
 from mathics.core.expression import Expression
 from mathics.core.number import FP_MANTISA_BINARY_DIGITS, SpecialValueError, min_prec
-
 from mathics.core.rules import Rule
-from mathics.core.symbols import Atom, Symbol
+from mathics.core.symbols import Atom
 from mathics.core.systemsymbols import (
     SymbolAbs,
-    SymbolComplexInfinity,
     SymbolE,
     SymbolEulerGamma,
     SymbolExp,
     SymbolI,
-    SymbolIndeterminate,
     SymbolKhinchin,
     SymbolLog,
     SymbolPi,
-    SymbolPlus,
-    SymbolPower,
     SymbolSign,
-    SymbolTimes,
 )
 
 # FIXME: replace by numpy constants:
@@ -221,7 +215,6 @@ def eval_Sign(expr: BaseElement) -> Optional[BaseElement]:
             return Expression(SymbolTimes, expr, norm)
         return result
     return None
-  
 
 
 def eval_Sign_number(n: Number) -> Number:
@@ -763,6 +756,7 @@ def eval_inverse_number(n: Number) -> Number:
     # Otherwise, use power....
     return eval_Power_number(n, IntegerM1)
 
+
 def eval_multiply_numbers(*numbers: List[Number]) -> Number:
     """
     Multiply the elements in ``numbers``.
@@ -819,8 +813,7 @@ def flat_arithmetic_operators(expr: Expression) -> Expression:
     return Expression(head, *items[True], *items[False])
 
 
-
-  def segregate_numbers(
+def segregate_numbers(
     *elements: BaseElement,
 ) -> Tuple[List[Number], List[BaseElement]]:
     """
diff --git a/mathics/eval/image.py b/mathics/eval/image.py
index 18bb6dee6..dd5fb6791 100644
--- a/mathics/eval/image.py
+++ b/mathics/eval/image.py
@@ -92,7 +92,6 @@ def extract_exif(image, evaluation: Evaluation) -> Optional[Expression]:
     Return None if there is no Exif information.
     """
     if hasattr(image, "getexif"):
-
         # PIL seems to have a bug in getting v2_tags,
         # specifically tag offsets because
         # it expects image.fp to exist and for us it
diff --git a/mathics/eval/parts.py b/mathics/eval/parts.py
index 3ecf356d1..61a1adf33 100644
--- a/mathics/eval/parts.py
+++ b/mathics/eval/parts.py
@@ -6,7 +6,7 @@
 
 from typing import List
 
-from mathics.core.atoms import Integer, Integer1
+from mathics.core.atoms import Integer
 from mathics.core.convert.expression import make_expression
 from mathics.core.element import BaseElement, BoxElementMixin
 from mathics.core.exceptions import (
@@ -20,11 +20,7 @@
 from mathics.core.list import ListExpression
 from mathics.core.subexpression import SubExpression
 from mathics.core.symbols import Atom, Symbol, SymbolList
-from mathics.core.systemsymbols import (
-    SymbolDirectedInfinity,
-    SymbolInfinity,
-    SymbolNothing,
-)
+from mathics.core.systemsymbols import SymbolInfinity, SymbolNothing
 from mathics.eval.patterns import Matcher
 
 
diff --git a/mathics/eval/testing_expressions.py b/mathics/eval/testing_expressions.py
index c15471f48..cab4a7d4b 100644
--- a/mathics/eval/testing_expressions.py
+++ b/mathics/eval/testing_expressions.py
@@ -13,7 +13,6 @@ def cmp(a, b) -> int:
 
 
 def do_cmp(x1, x2) -> Optional[int]:
-
     # don't attempt to compare complex numbers
     for x in (x1, x2):
         # TODO: Send message General::nord