Упростите выражение: (x-5)²-x(x+3) и (x-2)(x+2)-(4x+3)²

(x-5)²-x(x+3)=[latex] x^{2} [/latex]-10x+25-[latex] x^{2} [/latex]-3x=-13x+25-[latex] x^{2} [/latex]  (x-2)(x+2)-(4x+3)²=[latex] x^{2} [/latex]-2x-2x-4-(16[latex] x^{2} [/latex]+24x+9)=[latex] x^{2} [/latex]-2x-2x-4-16[latex] x^{2} [/latex]-24x-9=-28[latex] x^{2} [/latex]-13-24x