mathematics
posted by Allen .
2a^23a2/4a^21 (4a^21 = denominator) divided by a^24/2a^25a+2 < denominator

(2a^23a2)/(4a^21) Divided by
(a^24)/(2a^25a+2)
Invert divisor(2nd fraction) and multiply:
(2a^23a2)/(4a^21)*(2a^25a+2)/a^24.
(a2)(2a+1)/(2a+1)(2a1)*(a2)(2a1)/
(a+2)(a2) = (a2)/(a+2).
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