plus minus plus or minus equals sine arc sine arc cos arc tan perp dot centerdot dot dot dot cross for all dell less than or equal to less than or equal to greater than or equal to greater than or equal to to in infinity integral the integral over a closed path sum a A f F alpha beta chi delta Delta di-gamma epsilon eta gamma Gamma iota kappa lambda Lambda mu nu omega Omega fee Fee pi Pi sigh Sigh rho sigma Sigma tau theta Theta upsilon Upsilon epsilon kappa phi pi rho sigma theta xi Xi zeta absolute value of limit as root of square root of squared cubed inverse to the power of all over over