91Ó°ÊÓ

Find the Least Common Multiple, LCM, of \(12,18,21,25\) and 35 .

Find the greatest common divisor of 24 and 40 . Also, find the least common multiple of 24 and 40 .

Combine into a single fraction \(\left[2 x /\left(x^{2}-6 x+9\right)\right]-\left[8 /\left(x^{2}-2 x-3\right)\right]-1 /(x+1)\)