When you purchase a home by securing a mortgage, the total paid toward the principal is your equity in the home. (Technically, the lending agency calculates your equity by subtracting the amount you still owe on your mortgage from the current value of your
home, which may be higher or lower than your principal.) Assume that your mortgage is for $350,000 at a monthly rate of 0.002 as a decimal and that the term of the mortgage is 30 years. Then your equity after k monthly payments is

350,000 × 1.002^k − 1/1.002^360 − 1 dollars.

Calculate the equity in your home after 10 years

I am taking an online math class and the book does not teach us how to do these problems. Help!