Answer :
assuming '×' just means x,
3+ 4/x/1 − 5/x^2
=3x^3+4x^2−5x/ x3
=3x^2+4x−5/ x2
if the way this is written confuses you, here it is written more clearly:
3+ 4/x/1 − 5/x^2
=3x^3+4x^2−5x/ x3
=3x^2+4x−5/ x2
if the way this is written confuses you, here it is written more clearly:
