[tex] \frac{ x^{2} }{x+6}= \frac{1}{2} [/tex]

[tex] \frac{x+2}{x-1} + \frac{x}{x+1} = \frac{6}{ x^{2} -1 } [/tex]

[tex] \frac{ x^{2} -x}{x+3}= \frac{12}{x+3} [/tex]