Convert from expanded form to a Hindu-Arabic numeral.
$(8\times {10}^5)+(6\times {10}^4)+(2\times {10}^2)+(4\times 10)+(6\times 1)$

Write the expanded form of the following numerals.

$38,279$

Write the expanded form of the following numerals.

$5,204,817$

Convert from expanded form to a Hindu-Arabic numeral.

$(2\times {10}^5)+(4\times {10}^4)+(6\times {10}^3)+(8\times {10}^2)+(2\times {10}^1)+(4\times 1)$