Explanation
7a + 7b = 7(a + b). Since (a + b) = 8 this equation becomes 7(8) which is 56.
\(\sqrt {{{(6 + x)}^2}} = \)
\( (x - 5)({x^2} + 7x + 2) = ? \)
\(2(5+3 \times \sqrt{25}) \div(14-9) \times 4=?\)
\( {({6^3})^9}? \)