QUESTION TWO $(50$ marks$)$

Show that for second order gas$-$phase reaction

${\displaystyle \underset{0}{\overset{x}{}}}\frac{(1+x{)}^{2}dx}{(1-x{)}^2}=2(1+)ln(1-x)+{}^{2}x+\frac{(1+{)}^{2}x}{1-x}$