In the previous two assignments, operands are limited to non-negative values. Without changing much of the previous implementations, you can realize for negative operand values by transforming the operations with non-negative operand values. For instance, "-12345" + "-12345" can be expressed "0" - ("12345" + "12345"). This means that at an addition operator the two negative operand values are converted to positive values, i. e., negative sign are removed before applying addition operation followed by a subtraction. You can manipulate other cases in similar ways. Extend the previous two operators by adding a logic each to transform the formula. Use the supplied check logic. Set seed 789 for your submission. You can submit up to three times.