Respuesta :

ANSWER:

109 + 8yt - 2s

WORKING:

81 + 7x² + 8yt - sx

81 + 7(2)² + 8yt - s(2)

81 + 7(4) + 8yt - 2s

81 + 28 + 8yt - 2s

81 + 28 + 8yt - 2s

109 + 8yt - 2s