I tried the following, but it loses all formatting when creating a question in mathematics. Is there a way to specify coloured text which retains some form of formatting ?
$\color{blue}{\text{So the Gowers essay says that the set of all different subsets of N, P(N), is meaningful (by the Power set axiom), however it is impossible to talk about specific subsets of N, since they are undefinable in general, and we don't know what is in them. However the axiom of extensionality says we compare two sets by determining their common elements. So taking any two undefinable subsets at random, A & B from P(N), as mentioned in Gower's essay, we can't determine whether they are the same subset by using the axiom of extensionality, since it is impossible to know what are the actual contents of A & B. Indeed is it actually possible to pick two different undefinable subsets from P(N) anyway (without just saying they are two different sets from P(N)) ?}}$