[Python] How do I make the numbers do their operation? Is there any module that can do that?

def equalizer(entryblock):
x = entryblock.get()
entryblock.delete(0, tk.END)
entryblock.insert('end', int(x))


so here is a function for my tkinter calculator. I am trying to make a function where it takes the entry box and does the operations and gives the result. For example, if I punch in '1+2+3', I want this function to turn it into 6. Whenever I try this, it gives this error:

ValueError: invalid literal for int() with base 10: '1+2+3'


Could I use the math module to fix this problem?

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