The equation is .

In the above equation two operations subtraction and addition are involved.

The verbal form of addition represented as more than, sum, plus, increased by and added to.

The verbal form of subtraction represented as less than, subtracted from, difference, decreased by and minus.

The verbal form of represented as r squared minus 15.

The verbal form of represented as equals, is same as.

The verbal form of represented as the sum of t and 19.

The verbal form of represented as r squared minus 15 is same as the sum of t and 19.

The verbal form of equation is the number r squared minus 15 is same as the sum of t and 19.