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Quantitative Aptitude (CGL) Simplification

Tf ‘+’ means ‘-’,‘-’ means ‘+’, ‘x’ means ‘ $\div$ ’ and ‘ $\div$ ’ means ‘x’, then the value of $_{\left [_{3}^{2} \div 18 \right ]-\left [4\div 2 \right ]}^{\left [ (30\times 5)+\left ( 84\times 5 \right ) \right ]}\div 5$ is: