下列叙述不正确的是（　　）

设m=${\left(2\frac{1}{4}\right)}^{\frac{1}{2}}$﹣（﹣9.6）⁰﹣${\left(3\frac{3}{8}\right)}^{-\frac{2}{3}}$+（1.5）^﹣2；n=log₃$\frac{\sqrt[4]{27}}{3}$+lg25+lg4+$7^{{\log }_{7}2}$．求m+n的值．

The Penguins

    Skipper and his fellow penguins were originally just supporting roles in animated film Madagascar (2005). But in 2008 they took leading roles in their own TV series, and in 2014 starred in the film Penguins of Madagascar. The penguins' wisdom and humor not only appeal to kids, but also serve adult audiences well. So, it's not surprising that they get their own movie.

Scrat

    A small and furry squirrel with a long tail from animated movie Ice Age (2002), Scrat played a supporting role but has won the hearts of both children and grown-ups with his persistence(毅力). In the film, his chasing after his prized acorn(橡子) causes an Earth-shattering geological event. Scrat is a big part in the lasting attraction of the movie series Ice Age. Today, Scrat has his own animated mini-movies.