𝑎+𝑏+𝑐 :𝑚=𝑎 :𝑚+𝑏 :𝑚+𝑐 :𝑚.
2𝑎𝑏+6𝑎2𝑏2−4𝑏2 :−2𝑏=2𝑎𝑏 :−2𝑏+6𝑎2𝑏2 :−2𝑏−4𝑏2 :−2𝑏=
=−𝑎−3𝑎2𝑏+2𝑏;
12𝑎8𝑏6+60𝑎6𝑏8 :4𝑎5𝑏5=12𝑎8𝑏6 :4𝑎5𝑏5+60𝑎6𝑏8 :4𝑎5𝑏5=3𝑎3𝑏+15𝑎𝑏3.
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