1). 9^3-15^2: 16+(3/4)^3: 27/32 2). (7^2-51)^3*5/9+3.6: 9^2

1). 9^3-15^2:16+(3/4)^3:27/32=729-225:16+24/64*32/27=
=729-14,0625+0,5=715,4375

2). (7^2-51)^3*5/9+3.6:9^2=(49-51)³*5/9+3?6^81=(-2)³*5/9+2/45=
=-40/9+2/45=(-200+2)/45=-198/45=-4,4