add AM v4 api

[PureMathematics]

PR summary

PR Checklist

Please make sure that your PR fulfills the following requirements:

• The commit message follows the Angular Commit Message Guidelines.
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Current vs new behavior

Does this PR introduce a breaking change?

• Yes
• No

Other information

[CLAassistant]

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[rsimsibm2]

lgtm

[pyrooka]

A few things are missing from this PR:

• Missing unit and integration tests
• No evidence of a clean test run
• The code is not formatted, thus the builds fail. Run make lint-fix to address this
• The README is not updated
• The PR title should be corrected
• The CLA hasn't been accepted yet. (Or has it?)

See this PR as a reference: #242

Please address each element from the list above to get the PR merged in.