Question

a2+ba3+2ab3-3a3b-bab3+4a3b

Answer 1

here is ur answer...
hope it helps u

Answer 2

ANSWER WITH STEPS

$a^{2}+ba^{3}+2ab^{3}-3a^{3}b-bab^{3}+4a^{3}b$
$=a^{2}+a^{3}b+2ab^{3}-3a^{3}b-ab^{4}+4a^{3}b$
$=a^{2}+a^{3}b-3a^{3}b+4a^{3}b+2ab^{3}-ab^{4}$
$=a^{2}+(1-3+4)a^{3}b+2ab^{3}-ab^{4}$
$=a^{2}+2a^{3}b+2ab^{3}-ab^{4}$

Hope this may help you.