crazykid121828 crazykid121828 08-05-2018 Mathematics contestada Determine the sum: (9r3s2t − 4r2s2t2 − 6rs2t3) + (−4r3s2t + 8rs2t3). 3r10s10t10 −r3s2t + 4rs2t3 5r6s4t2 − 4r2s2t2 + 2r2s4t6 5r3s2t − 4r2s2t2 + 2rs2t3