(√5)²*(-√2)*(-√2)*√20 [(2√2)²*√10*√10]:√8-√0,2*√125 (5√2-30(√50+3) √8√2√4 √2√8√64 √7+√2√√4 √19-√3√9 √21-√21+√16

(√5)²*(-√2)*(-√2)*√20=5*(-2)*√20=(-10√20)=(-14√5) [(2√2)²*√10*√10]:√8-√0,2*√125=6*10:√8-5=60:√8-5=30√2-5 (5√2-30(√50+3)=5√2-30√50-90=5√2-35√25-90=-30√2-90 √8√2√4=√64=8 √2√8√64=√1024=32 √7+√2√√4=√7+√8=√7+2√2 √19-√3√9=√19-√27=√19-3√3 √21-√21+√16=√16=4