Mmm, not per se.
With the Balance control, it passes through the LPG, and you can only crossfade the external source with the output of the oscillator’s wavefolder. It’s more useful for adding a second oscillator or layering another source - for example I use the OP-1 to sequence the 0-Coast and also feed its output into the Balance to get a layered oscillator.
To use the Maths section as a mixer, you are losing the only source of CV mixing, which really reduces the complexity of modulation available to you. And one channel is fixed at unity so its usefulness is limited.
Again, it involves so much core functionality trade-off that I would really discourage you from planning on that use case. It’s a waste of its intentionally limited resources when there are plentiful cheap external ways to mix.