Proszę o rozwiązanie szybko (4-5y)kwadrat+(y+2)kwadrat i (x-y)kwadrat-(3x+6)kwadrat ???

[latex](4-5y)^2+(y+2)^2=16-40y-25y^2+y^2+4y+4=-24y^2-36y+20[/latex] [latex](x-y)^2-(3x+6)^2=x^2-2xy-y^2-9x^2-36x-36=-8x^2-36x-2xy-y^2-36[/latex]