Answer:
[tex]x^{3} +5y^{3} -1[/tex]
Step-by-step explanation:
Answer: x^2-1+5y^3
x^2+4+5y^3-6+1 (2x^2-2x^2 cancel each other.
x^2-1+5y^3 (4-6+1= -1)
