input: Write a python function to identify and store symbols from a mathematical expression.
  assert process_expression("3+5*(2-8)/4") == [{'type': '+', 'pos': 1}, {'type': '*', 'pos': 3}, {'type': '(', 'pos': 4}, {'type': '-', 'pos': 6}, {'type': ')', 'pos': 8}, {'type': '/', 'pos': 9}]
  assert process_expression("10-3/2+4*(1+1)") == [{'type': '-', 'pos': 2}, {'type': '/', 'pos': 4}, {'type': '+', 'pos': 6}, {'type': '*', 'pos': 8}, {'type': '(', 'pos': 9}, {'type': '+', 'pos': 11}, {'type': ')', 'pos': 13}]
  assert process_expression("100/20-5*2+3") == [{'type': '/', 'pos': 3}, {'type': '-', 'pos': 6}, {'type': '*', 'pos': 8}, {'type': '+', 'pos': 10}]
output: def process_expression(expression):
      symbols = "+-*/()"
      result = []
      for index, char in enumerate(expression):
          if char in symbols:
              result.append({'type': char, 'pos': index})
      return result