Run yacas command
yac(x, rettype = c("str", "expr", "silent"))
yacas command
str
for string/character, expr
for expression, silent
for silent
yac("D(x) x^2 + 4*x")
#> [1] "2*x+4"
yac("D(x) x^2 + 4*x", rettype = "str")
#> [1] "2*x+4"
yac("D(x) x^2 + 4*x", rettype = "expr")
#> expression(2 * x + 4)
yac("D(x) x^2 + 4*x", rettype = "silent")