"añadir y mezclar" in English

to aggregate- to count up- to annex- to insert- to tack on- to tag on- to write in- to write in- to inset- to add- to append- to incorporate- to increase

Y

and- so- well

to blend- to mix- to garble- to meld- to scramble- to intermingle- to jumble- to jumble up- to riffle- to shuffle- to toss- to combine- to dub- to involve- to admix- to blend in- to mix up