21 11/15 -- 8 2/3 == 13 1/15
13 1/15 ---- 8 2/3 == 4 2/5==4,4
((32/57 + 27/38) * 19/29 + (25/26 + 48/65) * 10/51 + (74/75 + 49/50) * 15/59) * 3/5 =
= ((145/114) * 19/29 + (25/26 + 48/65) * 10/51 + (74/75 + 49/50) * 15/59) * 3/5 =
= ((145/114) * 19/29 + (17/10) * 10/51 + (74/75 + 49/50) * 15/59) * 3/5 =
= ((145/114) * 19/29 + (17/10) * 10/51 + (59/30) * 15/59) * 3/5 =
= (5/6 + (17/10) * 10/51 + (59/30) * 15/59) * 3/5 =
= (5/6 + 1/3 + (59/30) * 15/59) * 3/5 = (5/6 + 1/3 + 1/2) * 3/5 =
= (5/3) * 3/5 = 1
(√x/(x-7)+√x/(√x-√7)²)*(x²-14x+49)/(√x+√7)=
=(√x/((√x-√7)*√x+√7))+√x/(√x-√7)²)*(x-7)²/(√x+√7)=
=(√x*(√x-√7)+√x*(√x+√7))/((√x+√7)(√x-√7)²)*(√x-√7)²*(√x+√7)²/(√x+√7)=
=(√x*(√x-√7+√x+√7)/(√x+√7)(√x-√7)²)*(√x-√7)²*(√x+√7)=√x*2√x=2x=2*13=26.
0,15 * 348,4 + 151,6 * 0,15 = 0,15 (348,4 + 151,6 ) = 0,15 * 500 = 75