exam Maths Puzzle Numerical Ability

i have to find the equivalent to this expression.
4(12m/3)+9-2(3m)
choices are as follows:
A: 16m+9
B: 31m
C: 10m+9
D: 19m
This problem has confused me. Thanks!!!

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exam Other Question

(3 - 7i)(2 + 4i),firstly,you expand it.(this is complex number),
(6 +12i - 14i +28 ) = 34 - 2i.ans(note: i^2 = -1.so -7i x +14i =28)
SOLVED BY JAMES(A.K.A, BOMBARD) SOLVE THE EQUATION ln(x + 5) - ln(3)=ln(x-3).