(First question: "Which expression is equivalent to...?) #digitalsat, #newsat, #sats, #satexam, #satexamprep, #sat, #satprep, #satpreparation, #satmath, #sattest, #satexampreparation, #tutoring, #collegeboard, #toefl, #studyinusa, #study, #learning, #university, #onlinetutoring, #collegeprep, #academics, #academic, #education, #exam, #reasoning, #gre, #algebra, #calculus, #studyinusa, #studyinturkey, #turkey, #greenacademics, #ivyleague, #harvard