1/75-1/45+1/105 =? 1/56-1/196-1/42=? 1/98+1/112+1/154 помогите

Question

1/75-1/45+1/105 =?

1/56-1/196-1/42=?

1/98+1/112+1/154
помогите

Answer 1

=105\7875-175/7875+75/7875=5/7875=1/1575

=42/2352-12/2352-56/2352=26/2352=23/1176



=176\17248+154\17248+112/17248=442/17248=221/8624