knitr::opts_chunk$set( error = TRUE, collapse = TRUE, comment = "#>", out.width = "100%" )
testthat::test_that("TRUE", { testthat::expect_true( yacR::is.ysym(Ryacas::ysym(1:5)) ) }) testthat::test_that("FALSE", { testthat::expect_false( yacR::is.ysym(1:5) ) })
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