c, $\frac{5^3.90.4^3}{25^2.3^2.2^{13}}=$ $\frac{5^3.2.3^2.5.(2^2)^3}{(5^2)^2.3^2.2^{13}}=$ $\frac{5^4.2^7.3^2}{5^4.3^2.2^{13}}=$ $\frac{1}{2^6}=$ $\frac{1}{64}$
d, $\frac{18.27+18.(-23)}{34.4-4.52}=$ $\frac{18.(27-23)}{4.(34-52)}=$ $\frac{18.4}{4.(-18)}=-1$