2(5-у^2)(y^2+5)+(y^2-3)^3-(y^2+y-1)(4-y^2) Помогите плиз

[latex]2(5-y^2) (y^2+5) + (y^2 - 3)^2 - (y^2 + y - 1) (4- y^2) =[/latex][latex]= (10 - 2y^2)(y^2 + 5) + y^4 - [/latex][latex]6y^2 + 9 - 4y^2 - 4y + 4 + y^4 + y^3 - y^2 =[/latex][latex]= 10y^2 + 50 - 2y^4 - 10y^2 + y^4 [/latex][latex]- 6y^2 + 9 - 4y^2 - 4y + 4 + y^4 + y^3 - y^2 =[/latex][latex]50 - 6y^2 + 9 - 4y^2 - 4y + 4 + y^3 - y^2 =[/latex][latex]y^3 - 11y^2 - 4y + 63 [/latex]