А)(z-7)*(z++3) во 2 степени б) у в 3 степени+(5-у)*(25+5у+у во 2 степени) !

а) (z-7)*(z+1)-(z+3)^2=z^2-6z-7-z^2-6z-9=-16

б) y^3+(5-y)*(25+5y+y^2)=y^3+125-y^3=125

а) (z-7)*(z+1)-(z+3)^2=z^2-6z-7-(z+3)^2=z^2-6z-7-(z^2+6z+9)=z^2-6z-7-z^2-6z-9=-6z-7-6z-9=-12z-7-9=-12z-16

б) y^3+(5-y)*(25+5y+y^2)=y^3+125-y^3=125