`tan^(-1)(1/7)-tan^(-1)(2/3)=?`

Prove that tan ^(-1)(1/5) + tan^(-1)(1/7) +tan^(-1)(1/3)+ tan ^(-1)(1/8) = pi/4

tan^(-1) (1/5) + tan^(-1) (1/7) + tan^(-1) (1/3) + tan^(-1) (1/8) = π/4

If S=tan^(-1)(1/3)+tan^(-1)(1/7)+tan^(-1)(1/13)+.... to 10 terms. Find tanS

If A=tan^(-1)(1//7), B=tan^(-1)(1//3) , then

Prove that: tan^(-1)(1)/(7)+tan^(-1)(1)/(13)=tan^(-1)(2)/(9)tan^(-1)+tan^(-1)(1)/(5)+tan^(-1)(1)/(8)=(pi)/(4)tan^(-1)(3)/(4)+tan^(-1)(3)/(5)-tan^(-1)(8)/(19)=(pi)/(4)tan^(-1)(1)/(5)+tan^(-1)(1)/(7)+tan^(-1)(1)/(3)+tan^(-1)(1)/(8)=(pi)/(4)cot^(-1)7+cot^(-1)8+cot^(-1)18=cot^(-1)(1)/(13)

Prove that : tan^(-1)(1)/(5)+tan^(-1)(1)/(7)+tan^(-1)(1)/(3)+tan^(-1)(1)/(8)=(pi)/(4)

Prove that: 2tan^(-1)(1)/(2)+tan^(-1)(1)/(7)=tan^(-1)(31)/(17)

Prove that: 2tan^(-1)(1)/(2)+tan^(-1)(1)/(7)=tan^(-1)(31)/(17)

Show that 2 tan^(-1)(1/2)+tan^(-1) (1/7)=tan^(-1)(31/17)