exam Maths Puzzle Numerical Ability

can you please help me in these solution I really i appriciated thank you

1) Multiply: [(1/4)z + (1/3)][(1/4)z - (1/5)]

2)Simplify and evaluate:
(22x5y-3z4/40x-2y-8z5)3
thank you so much

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exam Other Question

CAN SOMEONE PLEASE HELP ME WITH THIS PROBLEM:

FIND THE DISTANCE BETWEEN THE PAIR OF POINTS. (-2,-6) AND (7,-3)
A. 6
B. 72 SQARE ROOT 2
C. 72
D. 3 SQUARE ROOT 10 A two-digit number is three less than seven times the sum of its digits. If the digits are reversed, the new number is 18 less than the original number. What is the original number?