3*{(300-95/5)-[3*21-(8-2*3)]}

$$\left\{\left({\mathtt{300}}{\mathtt{\,-\,}}{\frac{{\mathtt{95}}}{{\mathtt{5}}}}\right){\mathtt{\,-\,}}\left[{\mathtt{3}}{\mathtt{\,\times\,}}{\mathtt{21}}{\mathtt{\,-\,}}\left({\mathtt{8}}{\mathtt{\,-\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{\mathtt{3}}\right)\right]\right\}$$ 3*{(300-95/5)-[3*21-(8-2*3)]}