chain2.tex

{\int }_{0}^{1}{f}\left( {x}\right) \mathrm{}{x}=\underset{{i}=0}{\overset{{\infty }}{\sum }}{{x}}_{{i}}=\underset{{i}=0}{\overset{{\infty }}{\prod }}{{x}}_{{i}}=\underset{{i}=0}{\overset{{\infty }}{\coprod }}{{x}}_{{i}}={\oint }_{0}^{1}{f}\left( {x}\right) \mathrm{}{x}={\iint }_{0}^{1}{f}\left( {x}\right) \mathrm{}{x}={\iiint }_{0}^{1}{f}\left( {x}\right) \mathrm{}{x}