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My tests in approaching four dimentional complex equations by solving for an imaginary/real ratio, and doing some inverse trig with the real and imaginary parts "where necessary" (It's more of an exception when it isn't as far as I've seen). I don't know if it all works, but all are (hopefully) algebraically solved by abusing complex geometry! I've found I can successfully integrate complex equations by solving for angles with respect to each part, deriving, rearranging, sometimes magic, and integrating to find "stuff". There's also plenty more, and I go on rants in the description of almost each one, because I'm completely insane and this is a cry for help.
Turns out sin and cos are what hold on complex planes, even when they look identical to sinh and cosh. I abused this to the highest degree I could and produced (occasionally potentially provably true) complex planes. The best explanation for most of what I'm doing involves an imaginary-imaginary plane based on the derivitives of x and y, and... y, it's not that hard, just a bit out of the box. Anyone actually interested in this will find it extremely easy once you see the patterns, and (in my experience) impossible to truly explain.
1. Cool little Trick with complex surfaces
2. Complex numbers hate making sense
3. [X,Y] "curve" of the imaginary root.
4. Using ln(0) to obtain congruent complex planes.
5. Complex Integration - The Easy Way
6. Complex "Integrals" of Complex Exponential Planes
7. The Actual Complex Integrals of all z^n
8. Riemann Zeta Circles, and parabola. For no reason at all.