Change the underlined nouns to direct object pronouns and make any other necessary changes.
me correct my many mistakes.

First of all, let's define some concepts.

Direct Object: It's a noun that receives, in an direct way, the action of a verb.

Direct Object Pronoun: It's a pronoun that replaces the direct object.

Indirect Object: It's the person, animal or thing that receives the action of a verb

Indirect Object Pronoun: It takes the action of a verb indirectly. It tells us to whom or for whom an action is done.

Moreover, direct and indirect object pronouns in Spanish agree in number and gender with the nouns they replace. The Tables below show those pronouns.

Everything's ok up to this point, so let's solve this problem with the information we have:

Mi hija se las mandó

_____________________________________

Mi hijo me la compró

_____________________________________

Mi mamá me los prestó

_____________________________________

Silvia y Renata nos los prepararon

_____________________________________

Héctor y Lorena nos las trajeron

_____________________________________

Mi hijo se las pidió

_____________________________________

Mis hijos se lo sirvieron

d. por

explanation:

there is no "following"