Identify-find number game

This is a Identify-find number game.The functions are:
1.Drag the appropriate number of cards to the bottom blue area so that the sum of the numbers represented by the dragged cards equals the target value required at the bottom.There is no limit to the number of dragging, but the sum should be equal to the bottom target value.
2.Sum:(Numbers represented by all images) + (The two white numbers at the bottom)
3.Subtraction:The sum of numbers in the blue area (i.e. the sum of numbers represented by the image) - The three white numbers at the bottom = ？