.
The rule is simple:
- where you see the third degree, is cubic;
- where you see logarithm ( log, in short ), is logarithmic;
- where you see degree of "e", is the exponent.
It is the rule.
The rest depends on your watchfulness/observancy.
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By the way, can you explain, why the last expression and the one before the last are identical ?
Did you include two identical expressions in order for we, the tutors, better memorized the repeating items ?