Answer :
a+b(2d*5d)+7654321−2234567
=a+10bd^2+5419754=(10bd^2)+(a)+5419754=10bd^2+a+5419754
Answer:=10bd^2+a+5419754
=a+10bd^2+5419754=(10bd^2)+(a)+5419754=10bd^2+a+5419754
Answer:=10bd^2+a+5419754