Question 465998
1.) {{{x+1/x=x^2/x+1/x=(x^2+1)/x}}}

2.) {{{a-a/b=ab/b-a/b=(ab-a)/b}}}

3.) {{{2m/1-1/m=2m^2/m-1/m=(2m^2-1)/m}}}

4.) {{{a+1/a^2=a^3/a^2+1/a^2=(a^3+1)/a^2}}}