exam Maths Puzzle Numerical Ability

Evaluate. (-1)(-1) - 25

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exam Other Question

Determine whether the relation is a function.
(0,4),(1,4),(2,5),(3,6),(4,6)
Preform the indicated operations and simplify:

(v-5/v-7)-(v+1/v+7)+(v-35/v^2-49)

Thank you I really need help with this!!!