How does this Op Amp and BJT circuit function? Block diagram and working explanation

Any suggestions how this circuit works?

Thanks.

From an initial inspection it appears to be a differential amplifier with a single ended ouput made of transistors and op amps. It resembles the innards of a 741 op-amp.
It also appears that the output of the OP are limited by the transistors ( hooked up as diodes) in the feeback circuit of OP1 and OP2. Then OP3 looks to be a non-inverting amplifier. It appears that OP1 and OP2 cause the emitter currents to become un-balanced which in-turns provides input to op3. The issue I have is Q7 - I think it is backwards - but then again I am probably wrong. Good luck

Looks like some sort of log-antilog system...Vo = k*V1*V2, where k = some function of R1, R2 & R3???