Преобразуйте в многочлен ( 7 класс)

A)(a^2-3a)^2=a^4-6a^3+9a^2
b)(1/2x^3+6x)^2=1/4x^6+6x^4+36x^2
c)(c^2-0.7c^3)^2=c^4-1.4c^5+0.49c^6
d)(4y^3-0.5e^2)^2=16y^6-4y^5+0.25y^4
e)(3/2a^5+8a^2)^2=9/4a^10+24a^7+64a^4
f)(0.6b-60b^2)^2=0.36b^2-72b^3+3600b^4
g)(3ab-1/6a^2)^2=9a^2b^2-a^3b+1/36a^4
h)(13c^4+1/4a^6c)^2=169c^8+6.5a^6c^5+1/16a^12c^2
i)(0.2xy+0.5x^2y^2)^2=0.04x^2y^2+0.2x^3y^3+0.25x^4y^4