Crear cuenta
(1)saltoCaballo(2, 8) # [[1, 6], [3, 6], [4, 7]]
saltoCaballo(3, 4) # [[1, 3], [1, 5], [2, 2], [2, 6], [4, 2], [4, 6], [5, 3], [5, 5]]
saltoCaballo(1, 1) # [[2, 3], [3, 2]]
saltoCaballo(1, 9) # []
(2)
check_mathematical_expression("1+1") # true
check_mathematical_expression("1+1+1") # true
check_mathematical_expression("1+1-1*1/1") # true
check_mathematical_expression("10/2.5") # true
check_mathematical_expression("0.10/2.5*5") # true
check_mathematical_expression("") # false
check_mathematical_expression("1+2-a*2") # false
check_mathematical_expression("1+2 -2") # false
removeLineBreak("a\nb"); // "ab"
removeLineBreak("a
b"); // "ab"
removeLineBreak("a <br> b"); // "a b"
removeLineBreak("a<br />b"); // true
removeLineBreak("a\nb<br>c<BR />d"); // "abcd"
