Đặt \(\frac{1}{y}=a\)
\(\int^{2x+3a=3}_{x-2a=5}\)
\(\Leftrightarrow\int^{2x+3a=3}_{2x-4a=10}\)
\(\Leftrightarrow\int^{7a=-7}_{x-2a=5}\)
\(\Leftrightarrow\int^{a=-1}_{x+2=5}\)
\(\Leftrightarrow\int^{\frac{1}{y}=-1}_{x=3}\)
\(\Leftrightarrow\int^{x=3}_{y=-1}\)