Remove or reduce background noise using ffmpeg with Windows .BAT script

To provide 3 ffmpeg scripts as Windows batch files for the 3 attached sample video files with parameters to remove or significantly reduce video background noise. The samples are typical of 3 different types of background noises for videos I have and will have in he future with background noise. To clarify: I need the batch scripts for future use - the attached videos are only samples. ONLY THOSE WITH FFMPEG NOISE REDUCTION EXPERIENCE SHOULD BID. Sample videos: 1. sound of indoor air conditioning or fan 2. video taken inside and low sound of outdoor air conditioning 3. low volume TV