Find the product of the expressions — task. Mathematics State Board, Class 8.

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1) ($x+$5) ($j+6$) $=$

$x j + j + 5 j + 30$
$x j + 6 x + 5 j + 30$
$x j + 30 + 5 j + x$

(9 m^{2} + 18) (8 m + 9 n + 4)

$=$

i i^{i} + 81 i^{2} n + 36 i^{2} + i m + 162 i + 72

(Note: Write the answer in standard monomial form and enter numbers and variables in separate windows; enter the powers in windows next to variables.)

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8. Find the product of the expressions

Exercise condition: