\(215\frac{53}{171}-213\frac{52}{171}+\frac{342342}{171171}-\frac{1}{171}\)
\(=215+\frac{53}{171}-213-\frac{52}{171}+\frac{342}{171}-\frac{1}{171}\)
\(=\left(215-213\right)+\left(\frac{53}{171}-\frac{52}{171}+\frac{342}{171}-\frac{1}{171}\right)\)
\(=2+2\)
\(=4\)
Study well ! >_<