Estimate a using inverse matrix calculation. This is principle of linear regression.
As a friendly reminder, we can see the test suite, so it makes the problem more challenging if the solution is not explicitly in the test suite.
The Test Suite needs to allow for floating-point errors in all test cases, as demonstrated in Solution 1575603. (Refer to Problem 44690.) Also, there should be at least four test cases for every problem.
The Goldbach Conjecture
surface of a spherical planet
Find the Nth Root of a Given Number
Basic commands - Least common multiple
Find x in provided equation!
Solve system of equation!
Calculate some equation
Extract a specific part of matrix!
Calculate solution of given polynomial
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