Calculus · Superchallenge problem

$3x^{2}\ln(1+x^{6})-2x\ln(1+x^{5})$

$3x^{2}\ln(1+x^{6})-2x\ln(1+x^{4})$

$3x^{3}\ln(1+x^{6})-2x\ln(1+x^{4})$

$3x^{2}\ln(1+x^{6})+2x\ln(1+x^{4})$