we have the following:
[tex]\begin{gathered} -3\mleft[\mleft(-7\mright)2-16\mright]\: +\: 4\: \div\: 2/5 \\ -3\cdot\lbrack-14\: -\: 16\rbrack\: +\: 4\: \div\: 2/5 \\ -3\cdot-30\: +\: 4\: \div\: 2/5 \\ 90+4\div\: 2/5 \\ 94\div\: 0.4 \\ 235 \end{gathered}[/tex]