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16a²-16b²=__ 8*1/36+16*1/6*5/6___
16*1/36-16* 25/36=__2/9+40/18___ 4/9-200/9
__2/9+20/9__-196/9
22/9__-196/9
2) 16(⅙)²-16(⅚)²=16•¹/₃₆-16•²⁵/₃₆=¹⁶/₃₆-⁴⁰⁰/₃₆=-³⁸⁴/₃₆