Perhaps, in the test-suite, you could account for small imprecisions? This would allow for answers that don't use the logspace command.
I agree; not accounting for imprecision is bad numerical practice.
Extract leading non-zero digit
Summing Digits within Text
01 - Scalar variables
05 - Vector Equations 1
03 - Matrix Variables 2
06 - Matrix Equations 2
06 - Matrix Equations 3
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