hello! I have to get to the second part of the ecuation with laplace and I have no idea how to do it step by step, help please, thaaanks!!
\(\displaystyle \displaystyle\int\limits_{-\infty }^{+\infty }{\left( \frac{\sin x}{x} \right)^{3}dx}=2\int\limits_{0}^{+\infty }{\frac{x^{2}}{2}\cdot \frac{6}{\left( x^{2}+1 \right)\left( x^{2}+9 \right)}dx}\)
\(\displaystyle \displaystyle\int\limits_{-\infty }^{+\infty }{\left( \frac{\sin x}{x} \right)^{3}dx}=2\int\limits_{0}^{+\infty }{\frac{x^{2}}{2}\cdot \frac{6}{\left( x^{2}+1 \right)\left( x^{2}+9 \right)}dx}\)
