exam Maths Puzzle Numerical Ability

How many terms are there in the following expression:
3x^3-6x[2(4x+2)+ 12]

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exam Other Question

8q2-63q-81 another problem!
find the third term in the expansion of (3t+4)^8 choices are: 48t^6, 11,644t^6, 326,592t^6 or 448t^6 really confused