(52^2+22^2/2-52*22)*1/44^2-6^2

чуть не так

(55^+22^2/2-(52*22*2)/2)*1/(50*38)=((52-22)^2/2)*1/(50*30)=(30^2/2)*1/1900=(900/2)*1/1900=450/(50*38)=9/38