book Maths Puzzle Numerical Ability

I have problems converting word problems into linear equations, could you please help me with this one?
1. America creates more garbage than any other nation. According to Denis H

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1. 37sqrt2x^5-60x^2sqrt50x


2. 44 ^3sqrt135x^5-90x^3sqrt5x^2


3. 13/^3sqrt25x

4. 3/^4sqrt2 Please help me answer this question:

What U.S. President has a unique proof of the pythagoream theorem?