(-7-1)*(-5+2)=24
2x【-(-7)-(-5)】x1=24
(2+-5)*(-7-1)((2+-7)*-5)-1(-5+2)*(-7-1)(-5*(2+-7))-1(-5*(-7+2))-1(-7-1)*(2+-5)(-7-1)*(-5+2)((-7+2)*-5)-1