Query MONGO fecha

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1

Please, who can help me, I need a query in mongodb to execute with a date of the last 4 days

2

something like that, but it extracts the last 3 days

{
$expr:{
$eq:[
‘$accountingDate’,
{
$dateToString:{
date:{
$dateAdd:{
startDate:‘$$NOW’,
unit:‘day’,
amount: -0
}
},
format:‘%Y-%m-%d’
}
}
]
}
}