Кто все сделает скину 100 р(правда)

а) log3 1/27 = log3 1/(3^3) = log3 3^(-3) = - 3 * log3 3 = - 3;б) (1/3)^2log1/3 7 = (1/3)^(log1/3 7^2) = (1/3)^(log1/3 49) = 49;в) log2 56 + 2log2 12 - log2 63 = log2 56 + log2 12^2 - log2 63 = log2 (56 * 144/63) = log2 128 = log2 2^7 = 7 * log2 2 = 7.