Please help with explanation thank you.

Find the area of an equilateral triangle with a side of 6 inches

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

Can someone me and explain..will award brainlest!