book Maths Puzzle Numerical Ability

i need to know the answer to this multi stepped equation:

-10=w-32+6

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book Other Question

Here is the question:
2v(3v2-1) - (6-8v3+14v)+3

here is my attempt:
6v3-2v - 6+6v2+3
4v2-3=6v2

What is the rule with exponents ?

~Tabitha 2log(x-5)=log9