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сумма
-acos(-4/5) + 2*pi + acos(-4/5)
=
2*pi
произведение
-acos(-4/5) + 2*pi * acos(-4/5)
=
(-acos(-4/5) + 2*pi)*acos(-4/5)
x_1 = -acos(-4/5) + 2*pi
x_2 = acos(-4/5)
x1 = 91.7496880628973
x2 = -59.0467593094128
x3 = -66.6169468341789
x4 = 90.4626858453107
x5 = 47.7673909126402
x6 = 544.139030179828
x7 = -52.7635740022332
x8 = 98.0328733700769
x9 = -22.6346496839218
x10 = 15.0644621591557
x11 = 33.9140180806944
x12 = 52.7635740022332
x13 = -8.7812768519761
x14 = -40.197203387874
x15 = -79.1833174485381
x16 = -84.1795005381311
x17 = 46.4803886950536
x18 = 2.49809154479651
x19 = -65.3299446165924
x20 = 3.78509376238308
x21 = -98.0328733700769
x22 = 79.1833174485381
x23 = 71.613129923772
x24 = 54.0505762198198
x25 = -41.4842056054606
x26 = 84.1795005381311
x27 = -10.0682790695627
x28 = -28.9178349911014
x29 = -47.7673909126402
x30 = -21.3476474663353
x31 = -147.011353609927
x32 = 22.6346496839218
x33 = 10.0682790695627
x34 = 28.9178349911014
x35 = -54.0505762198198
x36 = 77.8963152309515
x37 = 27.6308327735149
x38 = -217.413394206489
x39 = -46.4803886950536
x40 = -96.7458711524903
x41 = 59.0467593094128
x42 = -85.4665027557177
x43 = -77.8963152309515
x44 = 96.7458711524903
x45 = -35.201020298281
x46 = -15.0644621591557
x47 = -16.3514643767422
x48 = 72.9001321413585
x49 = -256822.701339421
x50 = -27.6308327735149
x51 = -72.9001321413585
x52 = 8.7812768519761
x53 = -60.3337615269994
x54 = -91.7496880628973
x55 = 16.3514643767422
x56 = 3653.02875501614
x57 = 85.4665027557177
x58 = -3.78509376238308
x59 = 35.201020298281
x60 = -71.613129923772
x61 = -90.4626858453107
x62 = 5287.94393710042
x63 = 65.3299446165924
x64 = 41.4842056054606
x65 = 40.197203387874
x66 = 66.6169468341789
x67 = 60.3337615269994
x68 = -33.9140180806944
x69 = 21.3476474663353
x70 = -2.49809154479651
x70 = -2.49809154479651