\"\"

\

The expression is  \"\".

\

Rewrite \"\" is \"\"

\

\"\"              (Substitute \"\")\"\"

\

(Apply distributive property: \"\")

\

\"\"        (Distribute 6)

\

\"\"                 (Multiply: \"\")

\

\"\"                       (Subtract: \"\")\"\"

\

The value of the expression is 23.4.