Use this security logo:
Status-bar Scientific Calculator manufacturer description
It's a tiny calculator icon in the status bar. Click it, to expand it and use it. Enter the expression to calculate and hit enter to evaluate.
Right click on the icon to change modes: hex,dec, bin or complex.There is also an option for any base b/w 2 and 24. You can also use page-down key to change base. Angle can be switched b/w radians and degrees.
In real mode operations supported are +, -, *, /, %, ^, !(factorial) and functions are asin, acos, atan, sin, cos, tan, sqrt, log, ln, exp.Default constants available are e ,mp ,me ,mn ,h ,qe , G, g, k, pi, ans. More constants can be added using the options window.
'%' can be switched to be use as modulo(remainder) or percent.
10%4 = 2 (while in modulo)
10 + 10% = 11; 10+10+10% = 21; 10*10% = 1 (while in percent)
In Complex mode operations supported are +, -, *, /, ^, and functions are sin, cos, tan, ln, exp, mod, re(real part), im(imaginary part). use 'i' for iota
1+i*(1+i) = i;
only three constants are available in complex mode: e, pi, ans
use functions with small brackets, ex sin(pi/2);
scientific notation (ex: 1e-23) is only allowed in decimal(base 10) mode.
Avoid using spaces
while working in base >10 use capital letters to denote numbers, ex 1A2 +B