exam Maths Puzzle Numerical Ability

2x^4 - 2x^2 + 4x - x^4 + 4x^2 - 2x + 5
simplify

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exam Other Question

find the suface are of the cone carol ordered 120 air filters for the garage. The number of air filters was 8 less than 2 times the number of gas filters ordered. How many gas filters were ordered?