DeleteElements

DeleteElements[list,{e₁,e₂,…}]

removes all instances of elements e_i from list.

DeleteElements[list,n{e₁,e₂,…}]

removes up to n instances of each e_i from list.

DeleteElements[list,{n₁,n₂,…}{e₁,e₂,…}]

removes up to n_i instances of e_i from list.

Details

The object list can have any head, not necessarily List.
DeleteElements[list,{n₁,n₂}{e,e}] removes up to n₁+n₂ instances of e from list.
DeleteElements[list,{e₁,e₂,…}] is equivalent to DeleteElements[list,Infinity{e₁,e₂,…}].

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Delete all instances of x and y from a list:

Remove up to two instances of x:

Remove up to one instance of x and up to two instances of y:

DeleteElements[list,elems] is equivalent to DeleteElements[list,Infinityelems]:

Remove one instance of b and then remove two other instances of b:

DeleteElements[list,elems] is equivalent to DeleteCases[list,Alternatives@@elems]:

DeleteElements[list,elems] removes elements from list, preserving the order and multiplicity of the other elements:

Complement[list,elems] does not preserve the order and multiplicity of the other elements:

SubsetReplace provides an alternative way of deleting a number of copies of an element from a list:

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