2007 Toyota Camry random misfires how to fix P0300 P0302 P0303

2007 Toyota Camry misfire fix I had a few misfires on this toyota camry i bought to resell. Heres how i fixed it. Codes I had : P0302 P0303 P0300 Ended up having to replace valve cover gasket , pcv valve , pcv hose , ignition coils, and spark plugs. I am not a mechanic, just a passionate DIY'er I am just sharing my experience in hopes that it can help someone in the same boat with misfires