(3*96-84*3)+(5*84-72*5)+(7*72-60*7)+(9*60-48*9)+(11*48-36*11)+(13*36-24*13) спомощью гауса....
(3*96-84*3)+(5*84-72*5)+(7*72-60*7)+(9*60-48*9)+(11*48-36*11)+(13*36-24*13)=576