Преобразуйте в многочлен стандартного вида: $(2a+3b) + (5a-1)$

1) $(2a+3b) + (5a-1) = 2a+3b+5a-1 = 7a+3b-1$ 2) $(5a^3+2a^2)-(3a^2+5) = 5a^3+2a^2-3a^2-5 = 5a^3-a^2-5$ 3) $(8a-7a^3)+(-a^2+3a^3+2) = 8a-7a^3-a^2+3a^3+2 = -4a^3-a^2+8a+2$ 4) $-(x^3+4x)+(x-2x^3) = -x^3-4x+x-2x^3 = -3x^3-3x$ 5) $(6y^5-3y^4)-(-2y^4+y^5-y^2) = 6y^5-3y^4+2y^4-y^5+y^2 = 5y^5-y^4+y^2$ 6) $(y^3-y^2)-(y^2-y^3)-(3y^2+y^3) = y^3-y^2-y^2+y^3-3y^2-y^3 = y^3-5y^2$ 7) $12x^3-(5x^2+3x^3)+12x^2-3 = 12x^3-5x^2-3x^3+12x^2-3 = 9x^3+7x^2-3$ 8) $10a^5-7a^3-(-a^5+6a^2-8a^3)+a^2 = 10a^5-7a^3+a^5-6a^2+8a^3+a^2 = 11a^5+a^3-5a^2$ 9) $4x^2-7x^4-(2x^2-4x^4-x^3)+(-x^3+x^4) = 4x^2-7x^4-2x^2+4x^4+x^3-x^3+x^4 = -2x^4+2x^2$ 10) $(2a^2-3ab+b^2)-(4a^2-6ab-2b^2)-2ab = 2a^2-3ab+b^2-4a^2+6ab+2b^2-2ab = -2a^2+ab+3b^2$ 11) $8ac-6ab+3b^3-(5ac-5ab-b^3) = 8ac-6ab+3b^3-5ac+5ab+b^3 = 3ac-ab+4b^3$ 12) $-2ab^2+3a^2b+a^2-(b^2+5a^2b-2ab^2) = -2ab^2+3a^2b+a^2-b^2-5a^2b+2ab^2 = -2a^2b+a^2-b^2$ 13) $-3x^3y^2-(-6xy^3+6x^3y)+(-3x^3y+4x^3y^3)-8x^3y = -3x^3y^2+6xy^3-6x^3y-3x^3y+4x^3y^3-8x^3y = 4x^3y^3-3x^3y^2-17x^3y+6xy^3$ 14) $0,2a^3b+0,3ab^3+0,4a^3b+0,5ba^3+0,6a^3b+0,7ab^3 = (0,2+0,4+0,5+0,6)a^3b+(0,3+0,7)ab^3 = 1,7a^3b+1,0ab^3$ 15) $-6x^2y^2-(-6xy^2+3x^2y+3x^2y^2+6)+10x^2y^2+6 = -6x^2y^2+6xy^2-3x^2y-3x^2y^2-6+10x^2y^2+6 = x^2y^2-3x^2y+6xy^2$