Question 380492
{{{(x^6+x^5)(x^6+x^5-x^4)=(x^6)(x^6+x^5-x^4)+(x^5)(x^6+x^5-x^4)}}}
{{{(x^6+x^5)(x^6+x^5-x^4)=(x^12+x^11-x^10)+(x^11+x^10-x^9)}}}
{{{(x^6+x^5)(x^6+x^5-x^4)=highlight(x^12+2x^11-x^9)}}}