RegEx to divide string by +*-/ and keep delimiter?

How can I split a string into pieces every time a "/*-+" appears and keep the delimiter? So, have something like

10x+4-1

turn into

10x
+
4
-
1

I've tried

@left_split = split(/(?<=\+)(?<=\-)(?<=\/)(?<=\*)/, $left_side);

I want the delimiter to be placed in its own array [].

However, if something like

4(x-3)

appears, how do I stop the reg-ex from splitting the 4(x and - 3)?