Graphic algebra problems. Very hard

Select your preferred difficulty level for algebra exercises. Very hard. Free and interactive.

1.png + 1 = 22 - 3 - 3.png
12 + 3 - 3.png = 7.png - 2
1.png - 3 = 16 - 2 - 7.png
Can you calculate the value of each of the elements?
3.png =
7.png =
1.png =