Distributive property ( me and show work first one to answer right gets brainiest answer )

8^2 /2+5(15-7)

=64/2+75-35
=32+40
=72

3(5−9)+4(4−9)
=(3)(−4)+4(4−9)
=−12+4(4−9)
=−12+(4)(−5)
=−12+−20
=−32

10(9−18)−32
=(10)(−9)−32
=−90−32
=−90−9
=−99

−12(5−7)−10(2−5)
=(−12)(−2)−10(2−5)
=24−10(2−5)
=24−(10)(−3)
=24−(−30)
=54

3(5-9)+4(4-9)
3x5=15
3x-9=-27
15+-27=-12

4x4=16
4x-9=-36
16+-36=-20

-12+-20=-32

The density of the cube is 40