$$40 - 2 \times 5 + 5 - 9 \div 4 \frac { 15 } { 2 } = ?$$
$\frac{787}{23}\approx 34.217391304$
$$40-10+5-\frac{9}{\frac{4\times 2+15}{2}}$$
$$30+5-\frac{9}{\frac{4\times 2+15}{2}}$$
$$35-\frac{9}{\frac{4\times 2+15}{2}}$$
$$35-\frac{9\times 2}{4\times 2+15}$$
$$35-\frac{18}{4\times 2+15}$$
$$35-\frac{18}{8+15}$$
$$35-\frac{18}{23}$$
$$\frac{805}{23}-\frac{18}{23}$$
$$\frac{805-18}{23}$$
$$\frac{787}{23}$$
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$\frac{787}{23} = 34\frac{5}{23} = 34.21739130434783$
