if i am making a very basic mistake please forgive me
Yes you are making a HUGE mistake:
1) The function generator circuit is designed to use OPAMPS. Opamps do not have internal biasing and do not have internal negative feedback.
2) You said you are using LM386 POWER AMPS instead. An LM386 has internal biasing and has internal negative feedback so they
cannot be used in the function generator circuit.
The Function generator opamps use a single-polarity positive supply and are biased at half the supply voltage with the two 10k voltage divider resistors. Then an attenuator and coupling capacitor can feed a 10k volume control that feeds the input of the LM386 power amp that drives a speaker.
The LM386 is made to use a single-polarity 6V to 9V supply, not 32V. With a +7.5V supply, its output power into an 8 ohm speaker is only 0.25W which is less volume than a cheap clock radio. The maximum allowed input to an LM386 is plus or minus 0.4V so you blew up its input transistors by feeding it half of +7.5V.
I don't know why you sketched the wrong circuit with three opamps. They will not work and are not needed anyway:
1) The positive power supply for the dual opamp is pin 8, not pin 5.
2) On the first opamp, you have its (+) input at the +20V supply voltage instead of at half the supply voltage so its output is saturated as high as it can go (+18.8V).
3) The second and third opamps are also powered on the wrong pins but are biased correctly at half the supply voltage. But the first opamp feeds +18.8V to the second opamp so its output is saturated as low as it can go (+0.05V). Then the third opamp has an input of +0.05V so its output is saturated as low as it can go (+0.05V).
EDIT: Biasing an opamp correctly at half the supply voltage has nothing to do with instability.
If you bias it wrong then it simply WILL NOT WORK.