Программа есть, только ошибка выводится , разобраться) from tkinter import * def qq(): a = EntryA.get() a = int(a) result1 = str1+a+a*a)/(2*a+a*a)+2-((1-a+a*a)/(2*a-a+a*a)))*(5-2*a*a)) result2 = str((4-a*a)/2) EntryC.delete(0, END) EntryC.insert(0, result1) EntryD.delete(0, END) EntryD.insert(0, result2) root = Tk() root.title('уравнения') root.geometry('800х800') can1 = Canvas(root) can1.grid(row=0, sticky=W) img1=PhotoImage(file='aaa1.png') can1.create_image(160, 60, image=img1) can2 = Canvas(root) can2.grid(row=1, sticky=W) img2=PhotoImage(file='aaa2.png') can2.create_image(60, 50, image=img2) Label(root, text='Введите a'grid(row=1, sticky=E) EntryA = Entry(root, width=10, font='Arial 16') EntryC = Entry(root, width=20, font='Arial 16') EntryD = Entry(root, width=20, font='Arial 16') EntryA.grid(row=1, column=1, sticky=E) EntryC = Entry(root, columnspan=1) EntryD = Entry(root, columanspan=1) but = Button(root, text='Решить', command=qq) but.grid(row=2, sticky=W) root.mainloop()