Mathematic Problems
271log23+5log2549×811log49-8log493+51log1625×5log59=
27log32+512×2log57×81log94-8log493+512×2log54×5log53=
33log32+5log57×34log94-23log493+5log54×5log53=
3log323+5log57×342log34-22×32log233+5log54×5log53=
23+7×3log342-262log233+4×3=
8+7×42-2log2333+4×3=
8+7×16-273+4×3=
-11
-11