code: def test_basic():
      def s(a, b):
          x = a
          x = +a
          x = -a
          x = a + b
          x = a - b
          x = a * b
          x = a / b
          x = a**b
          del x
  
      assert dotest(s)
  
imports: from sympy.core.numbers import Float, Rational
  from sympy.core.symbol import Symbol
label_desc: Use image node_id 3 for calling a global function with example usage: test_basic() without return types