2-8.mws

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cot(x) u
-1-cot(x)^2 -1-u^2
-2*cot(x)*(-1-cot(x)^2) 2*u+2*u^3
-2*(-1-cot(x)^2)^2+4*cot(x)^2*(-1-cot(x)^2)
-2*(-1-cot(x)^2)^2+4*cot(x)^2*(-1-cot(x)^2) 		-2-8*u^2-6*u^4
16*(-1-cot(x)^2)^2*cot(x)-8*cot(x)^3*(-1-cot(x)^2)
16*(-1-cot(x)^2)^2*cot(x)-8*cot(x)^3*(-1-cot(x)^2) 		16*u+40*u^3+24*u^5
-88*(-1-cot(x)^2)^2*cot(x)^2+16*(-1-cot(x)^2)^3+16*...
-88*(-1-cot(x)^2)^2*cot(x)^2+16*(-1-cot(x)^2)^3+16*...
-88*(-1-cot(x)^2)^2*cot(x)^2+16*(-1-cot(x)^2)^3+16*... 		-16-136*u^2-240*u^4-120*u^6