100:{250:[450-(4.53-32.25)]}
=100:{250:[450-(4.125-9.25)]}
=100;{250:[450-(500-225)]}
=100:{250:[450-275]
=100:{250:175}
=100:10/7
=70
\(100:\left\{250:\left[450-\left(4.5^3-3^2.25\right)\right]\right\}\)
\(=100:\left[250:175\right]\)
\(=100:\dfrac{10}{7}\)
\(=70\)
\(100:\left\{250:\left[450-\left(4.5^3-3^2.25\right)\right]\right\}\)
\(=100:\left\{250:\left[450-275\right]\right\}\)
\(=100:\left\{250:175\right\}\)
\(=100:\dfrac{10}{7}\)
\(=70\)