[-5/(3x-6)]-[x+3]/(x^2)-4=
the age of father is 5 more than 3 times the age of son. the sum of ages of the father and son is 65. What is the age of the son?
25 years hence, the age of a man shall be 3 times the age of his son while 5 year
earlier the age of the man was 7 times the age ...
58-79
What is the largest multiple of $9$ whose negation is greater than $-100$?
454884+28550 x 178456
the age of father is 5 more than 3 times the age of son. the sum of ages of the father and son is 65. the age of son is
(4m-1)+(5m+7)
sin x csc x