eVec = Hello
( eVec is a string, which is a vector of characters )
Extract leading non-zero digit
Tell me the slope
Make one big string out of two smaller strings
Detect a number and replace with two NaN's
05 - Vector Equations 3
07 - Common functions and indexing 5
06 - Matrix Equations 2
07 - Common functions and indexing 2
03 - Matrix Variables 4
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