I'm looking for a better solution for this situation:

I need all my formulas left-aligned. But with fractions I prefer, when numerator and denominator are centered to the fraction bar.

So far I formated every single fraction with the alignc command:

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`A = {alignc BB} over CCCC newline`

CCCC = BB over {alignc A}

And I had allways to check, if the numerator or the dnominator is smaller, and the smaller part needed the alingc command to make it centered to the fraction bar.

So my question is:

Does somebody knows a better way? May be a command which has only be written once for a line?

Cheers

Pepe