How Was it if there is a calculator with many useful features except than + - /. Etc. Features of XtraCalcx: 1. Simple Calculation. Add. Subtract. Multiply. Divide. Power. Percentage. Square Root. Cube Root. Factorial. X ^ -1. X ^ -1/y. X ^ 2. Remainder. 2. Standard Calculation. Lcm. Hcf/gcd. Roots in Simplest Forms Factor. Logarithm. Anti Logarithm.