How would i solve the rest of this?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y

Ineed on this question me get the answer