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сумма
-acos(4/7) + 2*pi + acos(4/7)
=
2*pi
произведение
-acos(4/7) + 2*pi * acos(4/7)
=
(-acos(4/7) + 2*pi)*acos(4/7)
x_1 = -acos(4/7) + 2*pi
x_2 = acos(4/7)
x1 = -38.6616625909622
x2 = 74.4356729382704
x3 = -43.0197464023724
x4 = 19.8121066694234
x5 = 13.5289213622439
x6 = -99.5684141669887
x7 = 5.3206345592949
x8 = 95.2103303555785
x9 = -57.511218512501
x10 = 63.7944038196806
x11 = 49.302931709552
x12 = 82.6439597412193
x13 = -0.962550747884687
x14 = -24.1701904808337
x15 = -55.5861170167316
x16 = 24.1701904808337
x17 = -80.7188582454499
x18 = -36.7365610951928
x19 = -82.6439597412193
x20 = 51.2280332053214
x21 = 43.0197464023724
x22 = -74.4356729382704
x23 = -7.24573605506427
x24 = 55.5861170167316
x25 = -13.5289213622439
x26 = 38.6616625909622
x27 = -17.8870051736541
x28 = 36.7365610951928
x29 = -63.7944038196806
x30 = 11.6038198664745
x31 = 93.2852288598091
x32 = 17.8870051736541
x33 = 70.0775891268601
x34 = 76.3607744340397
x35 = 44.9448478981418
x36 = 30.4533757880132
x37 = -68.1524876310908
x38 = -87.0020435526295
x39 = 80.7188582454499
x40 = 61.8693023239112
x41 = -11.6038198664745
x42 = -95.2103303555785
x43 = -32.3784772837826
x44 = -61.8693023239112
x45 = 26.095291976603
x46 = -30.4533757880132
x47 = 0.962550747884687
x48 = -49.302931709552
x49 = 7.24573605506427
x50 = 32.3784772837826
x51 = -88.9271450483989
x52 = -70.0775891268601
x53 = -76.3607744340397
x54 = -101.493515662758
x55 = 68.1524876310908
x56 = -5.3206345592949
x57 = -93.2852288598091
x58 = 87.0020435526295
x59 = -44.9448478981418
x60 = -26.095291976603
x61 = 99.5684141669887
x62 = -19.8121066694234
x63 = 88.9271450483989
x64 = -51.2280332053214
x65 = 57.511218512501
x65 = 57.511218512501