mate, i did 4u..i forgot it...
math133 is different to 4u hsc. It does cover some things like polynomials (in one or two hrs) and you are supposed to know how to integrate (incl. by parts), but these are things you can catch easily.
Most non 4u actuaries choose to do math135 in first sem and then math136 in second sem. 135 covers lot of 3u/4u hsc things. Math133 is the actuarial express unit where they cram 135 and 136 into one unit and get it down in 1/2 the time. It's better to do 135 and 136 (even for a 4u person, coz every1 gets rusty and forgets things), but then you have to pay an extra few hundred and waste some extra time.
In the end, it's not a huge concern. The maths we do plays with matrices, vector spaces, and 1st and 2nd order differential eqns - things that 4u barely touches.