First do the exponents.
$${{\mathtt{6}}}^{{\mathtt{36}}} = {\mathtt{10\,314\,424\,798\,490\,535\,546\,171\,949\,056}}$$
Now, add.
$${\mathtt{10\,314\,424\,798\,490\,535\,546\,171\,949\,056}}{\mathtt{\,\small\textbf+\,}}{\mathtt{3}} = {\mathtt{10\,314\,424\,798\,490\,535\,546\,171\,949\,059}}$$
So, the answer is $${\mathtt{10\,314\,424\,798\,490\,535\,546\,171\,949\,059}}$$.