Half m fourth power n third power - 5m third power Na + 0.25m square n) divided by - quarter m square n

Half m fourth power n third power - 5m third power Na + 0.25m square n) divided by - quarter m square n

(half m fourth power n third power - 5m third power n + 0.25m square n) divided by - quarter m square n
=-8m²n²+20m-1