book Maths Puzzle Numerical Ability

how do u evaluate an expression like 2 to the 3rd power times 3 -5 times 5 to the 2nd power plus 8

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book Other Question

What is the equation in standard form of the ellipse that has a center(-1,4), foci at (-1,8) and (-1,0), and the length of the minor axis is the sq. root of 3? Determine the GCF of the following terms:
54x^5 y^7 z^3 , 72x^3 y^5 z^2 , 63x^4 y^3 z^9