Return true if the input is a Smith number in base ten. Otherwise, return false. Read about Smith numbers at http://en.wikipedia.org/wiki/Smith_number.
A Smith number must be positive and have more than one factor.
Test for balanced parentheses
Program an exclusive OR operation with logical operators
Make one big string out of two smaller strings
Test within tolerance
Split up vector or matrix delimited by NaNs
Get input and output variable names
Remove TeX from string
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