1(7).Find the sum `-2frac{1}{3}+4frac(3)(5)`

Find the sum: 3(1)/(2)+7

Find the sum 3(1)/(5)+4(3)/(5)+7(2)/(5)

If f(x)=x^3-frac{1}{x^(3)} find the value of f(x)+f(frac{1}{x})

Find the sum of the infinite series (7)/(5)(1+(1)/(10^(2))+(1.3)/(1.2).(1)/(10^(4))+(1.3.5)/(1.2.3).(1)/(10^(6))+....)

sin^-1 (sin frac {2pi}3 )

Find the sum (1^4)/(1xx3)+(2^4)/(3xx5)+(3^4)/(5xx7)+......+(n^4)/((2n-1)(2n+1))

Find the sum of the series: (1)/((1xx3))+(1)/((3xx5))+(1)/((5xx7))+...+(1)/((2n-1)(2n+1))

frac{dP}{dx} = frac{d}{dx} (x^3) (frac{7-2x}{3})^(4)

Find the sum to n terms of the series (1)/(1*3*5*7*9)+(1)/(3*5*7*9*11)+(1)/(5*7*9*11*13)+"......" . Also, find the sum to infinty terms.

Find the sum of the series 1+4/5+7/(5^2)+10/(5^3)+...