exam Maths Puzzle Numerical Ability

Find a counterexample to the statement �The square of am integer added to the sum of the integer and five is a prime number�

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Hello out there,I need some help with one tough problem,the problem is,Which of the following points are solutions to:2x-3y<0 and x+y>4 (2,3),(0,1),or(1,4),thanks to whoever can help. The directions say, "Simplify each expression." How do you solve the problem r^3t^-7/t^5

I tried dividing the "t"s first. (I though you have to do like terms.) Thanks!