Add example construction from int and exp to docs

[mborland]

No description provided.

[codecov]

Codecov Report

Merging #359 (daecc6b) into develop (e9964c3) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop    #359   +/-   ##
=======================================
  Coverage     97.7%   97.7%           
=======================================
  Files           74      74           
  Lines         3370    3370           
=======================================
  Hits          3292    3292           
  Misses          78      78           

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