How do i convert between one space to another?

Im currently trying to make a simple IK-solution, and for this, i need to compare a bone location/rotation in another bonespace.

Specifically my question could be formulated as such:
Given a transform (representing space1) and another transform (representing space2) and transform1 in space1.
How do i convert transform1 in space 1 into corresponding transform1’ in space 2?

I need to do this in Blueprint.

293730-annotation-2019-12-11-090735.png

The 6 highlighted ones are what you’re after. World to Local and vice versa. There’s also Invert Transform - never run into a situation where I’d need to use it, though.

Thanks for your input. I know those 6 nodes, however what i ask for, is how to perform the specific described conversion.