Respuesta:
7. ( - 8 ) x 3 + 149 : ( 24 : 16 ) - ( 23 + 52 ) =
= 7 . ( -8 ) x 3 + 149 : 1'5 - 75 =
= - 56 x 3 + 99'3 - 75 =
= 168 + 99'3 - 75 =
= 192'3