Quadcopter motors Spinning At Different Speeds??| SP F3 flight controller problems02:42

Hey guys welcome again to TechShoppers, Today its your turn to give me some advice and suggestions in my problems related to quadcopter.
Go and see this video,please watch until end and comment if you can solve my problem .
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So racing f3 flight controller problems
Motors spinning at different speeds
Arming problem
How to calibrate ESC’s successfully