This was a fun problem, but I think lookup table solutions are possible given the way the way the test suite is configured. Maybe you could add a string parser to see if the test suite correct solutions are included in the answer code?
Find matching parenthesis
First non-zero element in each column
Number of Circles in a Number
Sum the 'edge' values of a matrix
Approximation of Pi
Increasing sub-sequence (Level 1)
Mean number of letters per word (Hard)
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