super urgent calucler et donner le resultat sous la forme la plus simple
A=(2/3:8/7):(-7/6+3/4)
B=(5/11-7/8)x33-3/8
(2/3:8/7):(-7/6+3/4)=(2x7:8x3):(-21x:12+9/12)=14/24:-12/12=14/24:-1=7/12:-1=-1
(5/11-7/8)x33-3/8=(5x8/11x8-7x11/8x11)x33x8/8-3/8=(40/88-77/88)x264/8-3/8=-37/88x261/8=9657/704