9-{6+[5-3+(6-2)]+8(4-7)}​

−15

Step-by-step explanation:

9−6+5−3+6−2+8(4−7)

=3+5−3+6−2+8(4−7)

=3+2+6−2+8(4−7)

=3+2+4+8(4−7)

=3+6+8(4−7)

=9+8(4−7)

=9+(8)(−3)

=9+−24

=−15

check the picture below.

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft