MIDDLE DOOR PUZZLE

Click on the white switch that is on the lower left side and it will activate the mechanism.
You will see some numbers flashing on the screen. You have to do the math and come up with the correct answer.
Click on the switches next to each number so that 2 lights on the same row are lit.
As you see the number show up on each row, do the math, either add or subtract.
Look on the top right side and you will see an arrow that points to certain colors.
Move the arrow to the color you want to change, you will notice around the board that there are colored dots with a space for 2 numbers next to it. Each time you enter a number, those dials will change.
This solution may be random but I posted the results that came up during my level.
Top row (pink lights) 27+24=51
Second row (green lights) 6-1=5
Third Row (orange light)71+09= 80
Bottom Row (light blue light) 63-32= 31
The doors will open automatically once you enter all the numbers correctly.