Упростите выражение: (а+4)2-4а-10= (3+5у)(3-5у)-3(у-2)= (2х+5)2-(х+5)(5-х)= (2-с)(4-с)+3с(с-1)=

[latex](a+4)^2-4a-10[/latex] [latex](a+4)(a+4)-4a-10[/latex] [latex]a^2+8a+16-4a-10[/latex] [latex]a^2+4a+6[/latex] [latex](3+5y)(3-5y)-3(y-2)[/latex] [latex]9-25y^2-3y+6[/latex] [latex]15-25y^2-3y[/latex] [latex](2x+5)2-(x+5)(5-x)[/latex] [latex](2x+5)(2x+5)-(5x-x^2+25-5x)[/latex] [latex]4x^2+20x+25+x^2-25[/latex] [latex]5x^2+20x[/latex] [latex](2-c)(4-c)+3c(c-1)[/latex] [latex]8-2c-4c+c^2+3c^2-3c[/latex] [latex]8-9c+4c^2[/latex]