How do i simplify the form of expression?

(4x + 5)(x - 7) - 4x^2 + 10x = 9

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.