化简
5／9－1／24
2x^2 − 3x + 1/2x^2 − 15x + 7
−12 + 8r − r^2/r^4 − 6r^3
(5a^2 + 12a + 4/a^4 − 16)/ (25a^2 + 20a + 4/a^2 − 2a)
(1/9s + 4)-[9/(9s + 4)^2]
(8/x)-(5x-4/x^2)+(x+2/x^3)
(t/t+3)+(4t/t-3)-(18/t^2-9)
(5x/4x+3)-(6/4x^2+3x)+(2/x)
5／9－1／24
2x^2 − 3x + 1/2x^2 − 15x + 7
−12 + 8r − r^2/r^4 − 6r^3
(5a^2 + 12a + 4/a^4 − 16)/ (25a^2 + 20a + 4/a^2 − 2a)
(1/9s + 4)-[9/(9s + 4)^2]
(8/x)-(5x-4/x^2)+(x+2/x^3)
(t/t+3)+(4t/t-3)-(18/t^2-9)
(5x/4x+3)-(6/4x^2+3x)+(2/x)
