Find the sum:- `3x^(2)+2x^(2)+3x^(2)`.

In the product (x^(2) -2) (1-3x+2x^(2)) the sum of coefficients of x^(2) and x is

The sum of the series x+(2^(2))/(2!)x^(2)+(3^(2))/(3!)x^(3) +…. to infty is

From the sum of 6x^(4) - 3x^(3) + 7x^(2) - 5x + 1 and -3x^(4) + 5x^(3) - 9x^(2) + 7x - 2 subtract 2x^(4) - 5x^(3) + 2x^(2) - 6x - 8

Find the product (x^(2)-3x+7)(2x+3)

Find the sum of the series 1+2x+3x^(2)+(n-1)x^(n-2) using differentiation.

Find the sum of the series 1+2x+3x^(2)+(n-1)x^(n-2)) using differentiation.