Just finished it.
I think the series is easier than FP1, except sometimes the cancellation can be quite challenging to spot.
Fractional inequalities are decent - hardest part is getting the range correct at the end.
Complex numbers - DeMoivres theorem is really good IMO - i think the transformations can go pretty insane - gonna have to smash them.
Differential order equations - Alot of it seems memory and then just some strong algebra manipulation - probably my weakest area ATM due to the fact i have not memorised the general solutions + some questions go insane with the chain rule.
Taylor and Maclaurin series - Seems quite standard - not done really any questions on them so do not know to the extent they can go to.
Polar coordinates - Can go from 0-100 real quick haha - sketching is tedious but somewhat accessible if you do a table of values.
Got a decent foundation knowledge of each topic - now it is time to put it to practise!