What will come in place of question mark (?) in the following questions ?
$$\frac{28 \times 5-15 \times 6}{7^{2}+\sqrt{256}+(13)^{2}}=?$$
Let x be the unknown quantity, then
x = $$\frac{140 - 90}{49 +16 + 169} = \frac{50}{234} = \frac{25}{117}$$
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