exam Maths Puzzle Numerical Ability

1)2x-5/(x-2)(x+6)over/divided by x^-2x+1/(x-2)(x+6)=?

2)4ab*b*b*b*b/a+b/6a^b*b*b*b=?

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exam Other Question

The perimter of a triangle is 46 cm. The triangle is isosceles now, but if its base were lenghtened by 6cm and each leg were shortened by 2 cm, it would be equilaterial. Find the base of the original triangle. If you bought 850 Douglas firs and ponderosa pines and paid an average of $300 for douglas firs and $225 for ponderosa pines and the total you spent was $217,500 how many of each tree did you buy?