Starting with polynomial:
P : t
Extension levels are: 1 2 4
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Trying to find an order 2 Kronrod extension for:
P1 : t
Solvable: 1
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Trying to find an order 4 Kronrod extension for:
P2 : t^3 - 3/5*t
Solvable: 1
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Ending with final polynomial:
P : t^7 - 77/45*t^5 + 749/891*t^3 - 31/297*t
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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:
| (0.96049126870802028342 + 8.8253901309920072671e-185j)  +/-  (1.73e-62, 1.73e-62j)
| (-0.77459666924148337704 + 3.1562054625721003772e-191j)  +/-  (2.04e-62, 2.04e-62j)
| (-0.96049126870802028342 + 2.5516019074809772891e-203j)  +/-  (1.56e-62, 1.56e-62j)
| (-0.434243749346802558 - 5.9409111446723744485e-212j)  +/-  (3.55e-63, 3.55e-63j)
| (0.434243749346802558 - 1.8130221999122236476e-217j)  +/-  (4.31e-63, 4.31e-63j)
| (0.77459666924148337704 - 5.7861103597786887564e-237j)  +/-  (1.97e-62, 1.97e-62j)
| (1.4860136122877276258e-357 + 4.9142065197732035127e-237j)  +/-  (3.44e-236, 3.44e-236j)
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The weights are:
| (0.10465622602646726519 - 9.3606980610311690306e-185j)  +/-  (6.14e-27, 1.92e-57j)
| (0.26848808986833344073 + 1.4601471456997978817e-185j)  +/-  (2.69e-27, 8.43e-58j)
| (0.10465622602646726519 - 4.808106340645780858e-186j)  +/-  (1.41e-27, 4.41e-58j)
| (0.40139741477596222291 - 2.5399044210651496146e-185j)  +/-  (9.67e-28, 3.07e-58j)
| (0.40139741477596222291 - 6.7316028455469478564e-185j)  +/-  (4.59e-28, 1.41e-58j)
| (0.26848808986833344073 + 1.3628596460354277451e-184j)  +/-  (3.11e-28, 9.22e-59j)
| (0.45091653865847414235 + 4.024272355653769255e-185j)  +/-  (3.06e-28, 9.9e-59j)
