Yes, you can modify the Python calculator to accept more complex input expressions like "(1+2) / (3 * 4) + 4". To do this, you can use the eval() function, which evaluates a string as a Python expression. Here's an updated version of the calculator:
```
def calculate():
    expression = input("Enter the expression: ")

    try:
        result = eval(expression)
        print(result)
    except Exception as e:
        print("Invalid expression:", e)

calculate()
```
In this updated version, the calculate() function takes an expression from the user, and then tries to evaluate it using the eval() function. If the evaluation is successful, it prints the result. If there is an error in the expression, it will print "Invalid expression" along with the error message.

Please note that using eval() can be risky, as it can execute any arbitrary code. You should use it with caution, especially if you are processing user input. If you need a safer alternative, consider using a library like asteval, sympy, or writing your own parser for mathematical expressions.
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