Expression 1: left parenthesis, "t" "x" plus 100 , right parenthesis cosine left parenthesis, "y" plus "t" , right parenthesis less than or equal to left parenthesis, "x" plus 100 , right parenthesis cosine left parenthesis, "x" plus "t" , right parenthesistx+100cosy+t≤x+100cosx+t