Answer:
a) 2x + 5 < (3x ^ 2 - 4)/2
b) 4x + y > x ^ 2 - 2xy + 3y
c) 2a * b ^ 2 > (a ^ 2 - 4b)2
d) a + b ^ 2 * a * n * d * a ^ 2 - b < a * b ^ 2 * a * n * d * a ^ 2 - b
D is probably incorrect, my bad, but I tried
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