Table 1: Test functions and their roots.

𝑓 1 ( 𝑥 ) = e x p ( 𝑥 ) s i n ( 𝑥 ) + l n ( 1 + 𝑥 2 ) 𝑥 = 0
𝑓 2 ( 𝑥 ) = 𝑥 1 5 + 𝑥 4 + 4 𝑥 2 1 5 𝑥 = 1 . 1 4 8 5 3 8
𝑓 3 ( 𝑥 ) = ( 𝑥 2 ) ( 𝑥 1 0 + 𝑥 + 1 ) e x p ( 𝑥 1 ) 𝑥 = 2
𝑓 4 ( 𝑥 ) = ( 𝑥 + 1 ) e x p ( s i n ( 𝑥 ) ) 𝑥 2 e x p ( c o s ( 𝑥 ) ) 1 𝑥 = 0
𝑓 5 ( 𝑥 ) = s i n 2 ( 𝑥 ) 𝑥 2 + 1 𝑥 = 1 . 4 0 4 4 9 1 6 5
𝑓 6 ( 𝑥 ) = e x p ( 𝑥 ) c o s ( 𝑥 ) 𝑥 = 0
𝑓 7 ( 𝑥 ) = l n ( 𝑥 2 + 𝑥 + 2 ) 𝑥 + 1 𝑥 = 4 . 1 5 2 5 9 0 7 4