х+5+14х+5у+10у+5=
= (14х+х)+(5у+10у)+(5+5)=
=15х+15у+10=
при х=0, у=0:
=15*0+15*0+10=
=0+0+10=10
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х+5+14х+5у+10у+5=
= (14х+х)+(5у+10у)+(5+5)=
=15х+15у+10=
при х=0, у=0:
=15*0+15*0+10=
=0+0+10=10