Question

(5m 3 + 3mn 2) + (-7m 2n + mn 2 - n 3) - (mn 2 + 2m 3)

Answer 1

Answer:

$3m^{3}+3mn^{2} -n^{3}- 14mn$

Step-by-step explanation:

I assumed that the numbers after the spaces were powers. This question was rather unclear.