a, {2019-2018^0[2 ³.5- (-1)^2018. 1/2^19.(2.5^2-2^4.3)^20]}+38 giúp mk nhaa

{$2019-1018^0.[2^3.5-(-1)^{2018}.$$\frac{1}{2^{19}}.(2.5^2-2^4.3)^{20}]$}$+38$

={$2019-1.[8.5-1.$$\frac{1}{2^{19}}.(2.25-16.3)^{20}]$}$+38$

={$2019-[40-$$\frac{2^{20}}{2^{19}}]$}$+38$

={$2019-[40-2]$}$+38$$

=2019-38+38

=2019$