1) 5(x-7)/(x'2+3)(x'2-81)
5x-35/x'4-81x'2+3x'2-243
5x-35/x'4-78x'2-243
2)45d'6y'8/27d'4y'14
5d'2/3y'6
1) 5(x-7)/(x'2+3)(x'2-81)
5x-35/x'4-81x'2+3x'2-243
5x-35/x'4-78x'2-243
2)45d'6y'8/27d'4y'14
5d'2/3y'6