[AASL][AAHL] Differentiation! (Unit Test v2.2)

Hello hello!

With just under 12 hours before the AA final exams, here's my last gift to M24: a set of unit tests.

This is not for the weak. If you want a motivation boost, go straight to my survival papers, not here.

May the odds be ever in your favour. c:

AASL:

AASL MS:

AAHL:

AAHL MS:

Andrew