exam Maths Puzzle Numerical Ability

I will try to write this correctly -

5^x-1 = 125^2x+3 ( the x-1 and 2x+3 should all be in superscript and raised)
HELP
need to solve

thank
lucy

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exam Other Question
Will someone please help me solve this problem? The problem states to divide using long division and to show all steps: (x^4+2x^3-16x^2+x+6)/(x-3) 3a+9/a*a^2/a^2-9 Find the product