Starting with polynomial:
P : 3/2*t^2 - 1/2
Extension levels are: 2 4
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Trying to find an order 4 Kronrod extension for:
P1 : 3/2*t^2 - 1/2
Solvable: 1
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Ending with final polynomial:
P : 3/2*t^6 - 25/14*t^4 + 45/98*t^2 - 1/98
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Computing nodes and weights
  current precision for roots: 53
  current precision for roots: 106
 current precision for weights: 53
Linear system for weights solvable: 1
  current precision for roots: 106
  current precision for roots: 212
 current precision for weights: 106
Linear system for weights solvable: 1
Sufficient bits for target precision reached
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The nodes are:
| (0.15655801081562154215 + 0j)  +/-  (7.53e-64, 7.53e-64j)
| (-0.57735026918962576451 + 5.9784679246222015251e-196j)  +/-  (3.75e-63, 3.75e-63j)
| (-0.91248695683407599658 + 1.7123510539128148748e-195j)  +/-  (4.8e-63, 4.8e-63j)
| (-0.15655801081562154215 - 3.9256215858480658591e-225j)  +/-  (7.53e-64, 7.53e-64j)
| (0.57735026918962576451 - 2.1612908839133067699e-224j)  +/-  (3.75e-63, 3.75e-63j)
| (0.91248695683407599658 - 2.3995149022330095277e-240j)  +/-  (4.8e-63, 4.8e-63j)
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The weights are:
| (0.35617300446694280136 - 2.5390310967369762008e-195j)  +/-  (4.16e-28, 1.65e-59j)
| (0.42352941176470588235 - 4.0747132904989561756e-195j)  +/-  (1.45e-28, 5.75e-60j)
| (0.22029758376835131628 + 2.6200634077816070542e-195j)  +/-  (2.01e-29, 7.89e-61j)
| (0.35617300446694280136 + 3.3313989872161308755e-195j)  +/-  (2.17e-28, 8.64e-60j)
| (0.42352941176470588235 + 8.2789041861092480661e-196j)  +/-  (2.68e-29, 1.11e-60j)
| (0.22029758376835131628 - 1.6560842637273035992e-196j)  +/-  (7.23e-30, 2.61e-61j)
