Simplify the expression: -m(9 - m) - (4 + m)/(m - 4) при m = -7/9

The expression is: -m(9 - m) - (4 + m)/(m - 4). Substitute m = -7/9: -(-7/9)(9 - (-7/9)) - (4 + (-7/9))/(-7/9 - 4). Simplify: (7/9)(9 + 7/9) - (4 - 7/9)/(-7/9 - 36/9) = (7/9)(81/9 + 7/9) - (36/9 - 7/9)/(-43/9) = (7/9)(88/9) - (29/9)/(-43/9) = 616/81 - (29/9) * (-9/43) = 616/81 + 29/43. Find a common denominator: (616 * 43 + 29 * 81) / (81 * 43) = (26488 + 2349) / 3483 = 28837 / 3483.