0.125*16/5-1/7*(-87.5)/15/16*16/15+(-2²)-4
=1/8*16/5+12.5*16/15*16/15-4-4
=2/5+25/2*16/15*16/15-8
=2/5+128/9-8
=-298/45
0.125*16/5-1/7*(-87.5)/15/16*16/15+(-4)-4 = -7.5444444444444
0.125*16/5-1/7*(-87.5)/15/16*16/15+(-2²)-4
=2/5+12.5*16/15*16/15+4-4
=2/5+3200/225
=2/5+128/9
=14+2/5+2/9
=14+28/45
=14又28/45