x - 2y + 3z = a
2x + y + z = 4
-3x + 2y - 2z = -10
Additional test cases were added along with an improved solution-checking assertion.
Sum all integers from 1 to 2^n
Make one big string out of two smaller strings
Replicate elements in vectors
Numerate input arguments
Find the product of the positive elements above the main diagonal.
Find matrix of indices for multidimensional matrix.
Create cotangent function out of sine.
Check if a string starts with another string
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