Subtract, divide the given expressions — task. Mathematics State Board, Class 9.

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1. Subtract the expression

(10 \sqrt{5} + 8 \sqrt{47})

$-$

(9 \sqrt{47} - 8 \sqrt{5})

2. Divide the expression

33 \sqrt{23}

11 \sqrt{23}

$=$

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9. Subtract, divide the given expressions