95 Mazda Millenia- P1195 & P1522: I have already replaced the mass air flow sensor all but 2 O2 sensors, and I have replaced the selenoid for the EGR according to the P1195 code problem/solution i

P1522 is not an O2 code in any Mazda model. Please go to this LINK and read about it.

Scanners aren't oracles and fault codes aren't gospel. Codes provide strong clues that mostly provide satisfaction but not always.
When a code pops up it can mean a circuit has been snagged rather than just a sensor and the circuit includes the wiring, connections and part of the ECU.

The results of a scanner should always be verified by independent testing of the component, multimeter checks of the circuitry and examining live data.

A back to basics approach is best rather than jumping in with the scanner. Bad injector spray patterns can cause a number of "unrelated" codes to pop up, for instance...

P1195 refers to the map sensor, not the egr solenoid. It could be a bad map sensor, bad wiring, or possibly a bad or loose vacuum hose.
P1522 refers to the air control flap actuator on the intake manifold. You can see about yhat at the link below.
https://www.autocodes.com/p1522_mazda.html

P1170 HO2S Bank 1 Sensor 1 Circuit Fixed (Bank 1 Sensor 1) The ECM (engine control module) is getting a low or no signal from the front oxygen sensor on bank #1. Possible bad sensor or open sensor circuit.
P1195 EGR Boost Sensor Circuit There is a problem with the EGR (exhaust gas recirculation) system. Possible plugged or restricted passage or sensor / sensor circuit problem.

P1195
Barometric pressure (EGR boost) sensor circuit malfunction
p1522
Variable resonance induction system (VRIS) solenoid valve #2 circuit malfunction
P1777
Torque reduced signal error (ECT sensor)
P1792
Throttle position sensor (TPS) malfunction

Thats a lot of sensors to fail at once i would check out the wire connected to your computer or maybe the computer itself...

sounds like its a different sensor causing problem. could be TPS SENSOR OR MAP SENSOR .

MASS AIR FLOW SENSOR IS ATTACH TO AIR DUCT TO AIR CLEANER HOUSING.

i think you have a vacumm leak po 170 is a lean code look for leaks also check and clean mass air flow sensor and you may have to take to dealer for that throttle screw that does not adjust the idle speed take carb cleaner and carfully spray around engine when running listen for change becareful around coils and exaust.

This is all due to a loose connection somewere. If your car had been worked on check all connector that are not plugged in tightly. Some newer cars even have a special lock lever to the connectors, and if not connected properly you would have all kinds of code poping up.