a) 213.6(42) > 213.598...;
b) -43.001 > -43.(001);
c)$ -\sqrt{237} $< -15;
d) $\sqrt{1\frac{40}{81}} $> $\sqrt{1\frac{20}{101}}$
e) 2 + $\sqrt{37}$ > 6 + $\sqrt{2}$
g)$\frac{\sqrt{5^{2}}+\sqrt{15^{2}}}{\sqrt{4^{2}}+\sqrt{36^{2}}} $ =$ \frac{1}{\sqrt{2^{2}}}$