Помогите исправить баг в 32 строке. SyntaxError: invalid syntax

Я знаю, что мой код полная ерунда нечитаемая, но помогите пожалуйста.

import flet as ft
def main(page: ft.Page):
    page.theme_mode = 'dark'
    page.window_width = 290
    page.window_height = 335
    page.window_resizable = False
    page.title = 'Калькулятор'

    def set_color_d(e):
        page.theme_mode = 'dark'
        page.update()
    def set_color_l(e):
        page.theme_mode = 'light'
        page.update()

    def main_(e):
        page.add(calculator)
        page.remove(settings)
        h.disabled = True
        s.disabled = False
        page.update()

    def settings_(e):
        page.add(settings)
        page.remove(calculator)
        h.disabled = False
        s.disabled = True
        page.update()
    prim = ft.TextField()
    primer = str(prim.value)
    def result(e):
        res = eval(primer) #Баг здесь
        print(res)

    h = ft.MenuItemButton(
        content=ft.Text("Home"),
        leading=ft.Icon(ft.icons.HOME),
        style=ft.ButtonStyle(bgcolor={ft.MaterialState.HOVERED: ft.colors.BLUE}),
        on_click=main_,
        disabled=False)
    s = ft.MenuItemButton(
        content=ft.Text("Settings")  
        leading=ft.Icon(ft.icons.SETTINGS),
        style=ft.ButtonStyle(bgcolor={ft.MaterialState.HOVERED: ft.colors.BLUE}),
        on_click=settings_,
        disabled=False)
    menubar = ft.MenuBar(
        expand=True,
        controls=[
            ft.SubmenuButton(
                content=ft.Text("Menu"),
                controls=[
                    ft.Text('Mode'),
                    h,
                    s,
                    ft.Text('Theme'),
                    ft.MenuItemButton(
                        content=ft.Text("Dark"),
                        leading=ft.Icon(ft.icons.DARK_MODE),
                        style=ft.ButtonStyle(bgcolor={ft.MaterialState.HOVERED: 
   ft.colors.BLUE}),
                        on_click=set_color_d
                    ),
                    ft.MenuItemButton(
                        content=ft.Text("Light"),
                        leading=ft.Icon(ft.icons.LIGHT_MODE),
                        style=ft.ButtonStyle(bgcolor={ft.MaterialState.HOVERED: 
    ft.colors.BLUE}),
                        on_click=set_color_l
                    )
                ]
            ),
        ])


    menu = ft.Row([menubar])
    page.add(menu)
    calculator = ft.Column(
        [
            prim,
            ft.Row(
                [
                    ft.ElevatedButton('0'),
                    ft.ElevatedButton('1'),
                    ft.ElevatedButton('+'),
                    ft.ElevatedButton('/'),]),
            ft.Row(
                [
                    ft.ElevatedButton('2'),
                    ft.ElevatedButton('3'),
                    ft.ElevatedButton('4'),
                    ft.ElevatedButton('x'),]),
            ft.Row(
                [
                    ft.ElevatedButton('5'),
                    ft.ElevatedButton('6'),
                    ft.ElevatedButton('7'),
                    ft.ElevatedButton('-'),]),
            ft.Row(
                [
                    ft.ElevatedButton('8'),
                    ft.ElevatedButton('9'),
                    ft.ElevatedButton(','),
                    ft.ElevatedButton('=', bgcolor=ft.colors.BLUE, color=ft.colors.WHITE, on_click=result)])
        ]
    )
    settings = ft.Column(
        [
            ft.Text('Settings', size=28)
        ]
    )
    page.add(calculator)
ft.app(target=main, view=ft.AppView.FLET_APP)