$6-4+8:26-4+8:2$

$4\cdot 2+34\backslash cdot2+3$

$15-7\cdot 2+415-7\backslash cdot2+4$

$25+14-13\cdot 3+525+14-13\backslash cdot3+5$

$5\cdot 3\cdot 7+15\backslash cdot3\backslash cdot7+1$

$6:3+15:36:3+15:3$