Q: Rough start/idle plus loss of power

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The car is experiencing hard start only when it's cold and from time to time it had rough idle which gets rougher when the car is in gear. I've replaced fuel and air filters. Also car has loss of power when I punch it. I ran diagnostics and the car. Some back with whole bunch of codes for miss fires P0300-P0306, fuel pressure regulator performance P2293. I might also add I'm terrible at maintaining the car and have a oil leak :(((

My car has 125000 miles.
My car has an automatic transmission.

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