first is 1+tan^2x/csc^2x.. I get it down to 1/cos^2x* sin^2x/1. Answer is supposed to be tan^2(x)

also

(sec^2x+csc^2x)-(tan^2x+cot^2x)

I got this down to

(1/cos^2*sin^2x)-(tan^2x*tan^2x+1/tan^2x)

answer books says it all equals 2

Please show me how to do these problems. Thanks in advance.