Main.hs:72:9: Warning: No explicit method nor default method for `abs' In the instance declaration for `Num (Ps a)' Main.hs:72:9: Warning: No explicit method nor default method for `signum' In the instance declaration for `Num (Ps a)' Main.hs:88:9: Warning: No explicit method nor default method for `fromRational' In the instance declaration for `Fractional (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `pi' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `exp' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `log' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `sin' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `cos' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `asin' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `atan' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `acos' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `sinh' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `cosh' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `asinh' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `atanh' In the instance declaration for `Floating (Ps a)' Main.hs:116:9: Warning: No explicit method nor default method for `acosh' In the instance declaration for `Floating (Ps a)'