А) ..= 4(y-3)+3(y+1)/24 = 4y-12+3y+3/24 = 7y-9/24
б) ..= 5(5y-3)-12(2+y)/60y = 25y-15-24-12y/60y = 13y-39/60y
в) ..= y+3-y/y^3 = 3/y^3
г) ..= a(7-2b)-b(8-a)/ab = 7a-2ab-8b+ab/ab = 7a-ab-8b/ab
д) ..= a(a^2-b)-b(b-a)/a^2b^3 = a^3-ab-b^2+ab/ a^2b^3 = a^3-b^2/a^2b^3
е) ..= 4/3-y + y+1/2(3-y) = 8+y+1/2(3-y)
ж) ..= 4-a/4a + 3/3(1-a) = 4-a/4a + 1/1-a = (1-a)(4-a)+4a/4a(1-a) = 4-a-4a+a^2+4a/4a-4a^2 = 4-a+a^2/4a-4a^2 = a^2-a+4/4a-3a^2
з) ..= x+1/(x-3)(x+3) - 2/x(x-3) = x(x+1)-2(x+3)/x(x+3)(x-3)=x^2+x-2x-6/x(x+3)(x-3) = x(x+2)-3(x+2)/x(x+3)(x-3) = (x-3)(x+2)/x(x+3)(x-3) = x+2/(x-3)
и) ..= 8y-4y(2-y)/2-y = 8y-8y+4y^2/2-y = 4y^2/2-y