how to reach 987 with numbers 2 and 9

Here's another way:

29^2 + 29[√9 +2] - [2 - √9] =

841 + 29(5) - (-1)

841 + 145 - (-1)  =

841 + 146  =

987

$${{\mathtt{2}}}^{{\mathtt{9}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{2}}{\mathtt{\,\times\,}}\left({{\mathtt{9}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{{\mathtt{9}}}^{{\mathtt{2}}}\right){\mathtt{\,\small\textbf+\,}}{{\mathtt{9}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{{\mathtt{9}}}^{{\mathtt{2}}}{\mathtt{\,-\,}}{\mathtt{9}}{\mathtt{\,-\,}}{\mathtt{2}} = {\mathtt{987}}$$