$$Answer: 77$$
Do you want to know how to solve it?
First, do the parentheses.
$$\left({\mathtt{7}}{\mathtt{\,\small\textbf+\,}}{\mathtt{3}}\right) = {\mathtt{10}}$$
$$\left({\mathtt{5}}{\mathtt{\,-\,}}{\mathtt{11}}\right) = -{\mathtt{6}}$$
$$\left({\mathtt{18}}{\mathtt{\,\times\,}}{\mathtt{0}}\right) = {\mathtt{0}}$$
Now, multiply.
$${\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{\mathtt{10}} = {\mathtt{100}}$$
$${\mathtt{7}}{\mathtt{\,\times\,}}{\mathtt{0}}{\mathtt{\,\times\,}}-{\mathtt{6}} = {\mathtt{0}}{\mathtt{\,\times\,}}-{\mathtt{6}} = {\mathtt{0}}$$
Now add.
$${\mathtt{100}}{\mathtt{\,\small\textbf+\,}}{\mathtt{0}} = {\mathtt{100}}$$
Now, subtract.
$${\mathtt{100}}{\mathtt{\,-\,}}{\mathtt{23}} = {\mathtt{77}}$$
So, $${\mathtt{77}}$$ is the answer.
Hope it helps!