Mystery Killer Sudoku Pro Zero

Mystery Killer Sudoku Pro Zero is killer variant #18. It is commonly known as the UKC (Ultimate Killer Condrum). It is an extremely hard killer variant. The rules are as follows: Place a digit from 1-9 into each row, column and 3x3 box just once. In addition, the digits in each inner shape (marked by dotted lines) must add up to the total shown in the top-left corner of that inner shape. No digit can repeat in an inner shape. For Subtraction and Division operations, start with the largest digit. You do not get told which operation to use because of Mystery! There are all of these operations because of Pro! There aren't much inner shapes because of Zero! Enjoy the puzzle!