\(=\frac{3}{x}+55+\frac{50}{5}-x\)
\(=\frac{3}{x}+55+10-x\)
\(=\frac{3}{x}+65-x\)
\(=\frac{3+65x-x^2}{x}\)
\(=\frac{3+x.\left(65-x\right)}{x}\)
\(=\frac{3}{x}+\frac{x}{x}.\left(\frac{65-x}{x}\right)\)
\(=\frac{3}{x}+1.\left(\frac{65}{x}-\frac{x}{x}\right)\)
\(=\frac{3}{x}+\frac{65}{x}-1\)
\(=\frac{68}{x}-1\)