10-10.5/【5.2*14.6-(9.2*5.2+5.4*3.7-4.6*1.5)]
=10-10.5/【5.2*14.6-（47.84+19.98-6.9]
=10-10.5/【5.2*14.6-60.92]
=10-10.5/15
=10-0.7
=9.3