exam Maths Puzzle Numerical Ability

insert parenthesis to make the following statement true

1+2x3-5=5

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exam Other Question

what is stamp in prealgebra the words for GCF & LCM 2^2x - 12(2^x) + 32 = 0

I know the answers are 2 and 3 but I do not know how to prove it algebraically