exam Maths Puzzle Numerical Ability

ok there is this extremely hard question for our class extra credit so here it goes.....
9821734682123457(squared)+2*18927365=819723568917469567

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exam Other Question

solve the linear inequality and graph the solution
x-2y>4
x<4

(also there is a little line under they < and > symbols.
Simplify:

(-11)(-5)