Universal electromagnetic field formula

[pixelpuffin]

does anybody know where i could find a universal or nearly universal electromagnetic field equation
by universal i mean instead of calculating for a solenoid or a loop of wire just calculating for a wire weather curved or not which is in the presence of another magnetic field of a predefined intensity
i need to calculate for inductance force between fields and magnetic field intensity but if you know of even one i would greatly appreciate it

 

[SteamKing]

This guy Maxwell came up with some nifty EM field equations.