-32+(-21+9)×21÷6-15×(-7) Berapa hasil operasi campuran diatas

-32 + ( -21+9) x 21 : 6 - 15 x (-7)
=-32 - 12 x 21 : 6 - 15 x (-7)
=-32- 252 : 6 + 105
=-32 - 42 + 105
= 31