use a less desctructive way to fix symbol missing issue

Author: BlankShrimp

mathics/core/convert/sympy.py

@@ -61,14 +61,14 @@
     SymbolGreater,
     SymbolGreaterEqual,
     SymbolIndeterminate,
-    SymbolIntegers,
+    SymbolInteger,
     SymbolLess,
     SymbolLessEqual,
     SymbolMatrixPower,
     SymbolO,
     SymbolPi,
     SymbolPiecewise,
-    SymbolReals,
+    SymbolReal,
     SymbolSlot,
     SymbolUnequal,
 )
@@ -143,9 +143,9 @@ def apply_domain_to_symbols(symbols: Iterable[sympy.Symbol], domain) -> dict[sym
     # it would refuse to solve Abs() when symbol is in Complexes
     result = {}
     for symbol in symbols:
-        if domain == SymbolReals:
+        if domain == SymbolReal:
             new_symbol = sympy.Symbol(repr(symbol), real=True)
-        elif domain == SymbolIntegers:
+        elif domain == SymbolInteger:
             new_symbol = sympy.Symbol(repr(symbol), integer=True)
         else:
             new_symbol = symbol

mathics/core/systemsymbols.py

@@ -55,7 +55,7 @@
 SymbolColorQuantize = Symbol("System`ColorQuantize")
 SymbolCompile = Symbol("System`Compile")
 SymbolCompiledFunction = Symbol("System`CompiledFunction")
-SymbolComplex = Symbol("System`Complex")
+SymbolComplex = Symbol("System`Complexes")
 SymbolComplexes = Symbol("System`Complexes")
 SymbolComplexInfinity = Symbol("System`ComplexInfinity")
 SymbolCondition = Symbol("System`Condition")
@@ -124,7 +124,7 @@
 SymbolInfinity = Symbol("System`Infinity")
 SymbolInfix = Symbol("System`Infix")
 SymbolInputForm = Symbol("System`InputForm")
-SymbolInteger = Symbol("System`Integer")
+SymbolInteger = Symbol("System`Integers")
 SymbolIntegers = Symbol("System`Integers")
 SymbolIntegrate = Symbol("System`Integrate")
 SymbolLeft = Symbol("System`Left")
@@ -201,7 +201,7 @@
 SymbolRandomReal = Symbol("System`RandomReal")
 SymbolRational = Symbol("System`Rational")
 SymbolRe = Symbol("System`Re")
-SymbolReal = Symbol("System`Real")
+SymbolReal = Symbol("System`Reals")
 SymbolReals = Symbol("System`Reals")
 SymbolRealAbs = Symbol("System`RealAbs")
 SymbolRealDigits = Symbol("System`RealDigits")