Ab/(a+b)*a²b²/(a²+b²)*(a⁸-b⁸)/(a⁴+b⁴)=ab/(a+b)*a²b²/(a²+b²)*(a⁴-b⁴)(a⁴+b⁴)/(a⁴+b⁴)=
=ab/(a+b)*a²b²/(a²+b²)*(a⁴-b⁴)=ab/(a+b)*a²b²/(a²+b²)*(a²-b²)(a²+b²)=ab/(a+b)*a²b²*(a²-b²)=ab/(a+b)*a²b²*(a-b)(a+b)=ab*a²b²(a-b)=(√11+1)(√11-1)*(√11+1)²*(√11-1)²(√11+1-√11+1)=(11-1)(11+2√11+1)(11-2√11+1)2=20(12+2√11)(12-2√11)=20(144-44)=20*100=2000