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{(x{T)/(x^2|Qx|R)}{{1/(^2{Rx{Q)}
[(x{T)/{(x{1)(|3)}]{[1/{({1)({Q)}]
{({T)({Q){(|R)}/{({1)({Q)(|R)}
(^2{W{V)/{({1)({Q)(|R)}
({V)/{({Q)(|R)}