Question

( - ) ( - ) ( - ) ( =frac{1}{n} ) ( frac{5}{x^{3}} ) ( T ) ( = ) as
( ? )
1 ( uparrow ) ( -N )
1 1 言
2 7 0 ( sqrt[2]{x} ) ( c^{2} )
if
. ( r ) ( Sigma ) 10
( frac{2}{2} ) 5
( sum )
? 1 ( - ) begin{tabular}{r}
-1
hline
end{tabular} ( - ) ( r )
( frac{y^{2}}{a} ) 1 ( frac{a}{a} )

# (x^2 - x 112 x^2 + y)2 x32 112 28 xy2 + xyxy!2 – x"y) x+y x-y

Solution