(d-8)(d+2)-(d+5)(d-15)=
d^2-6d-16-d^2+10d+75=
4d+59=
-0,18*4+59=58,28
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(d-8)(d+2)-(d+5)(d-15)=
d^2-6d-16-d^2+10d+75=
4d+59=
-0,18*4+59=58,28