The answer is quintic binomial.
It is quintic because its highest power is 5. Quartic would mean its highest power is 4.
It is a binomial because the two terms are -4x^5 and -6x^3. Terms are separated by + or - signs.
Hopefully this helps
think of the symbols as crocodiles ( like a crocodile mouth)
the crocodile always wants to eat the biggest number
for example:
10>3
GOOD LUCK
Can you give some more details please thank you