This app contains a series of calc: - Pro scientific calculator 30 plus: the calcu 30 can perform all the basic fraction calculations like fractions. The x30 offers the same capabilities, include factorial, random integer and mixed fraction. - Free scientific calculator 34 emulator: Factor integer into prime in Math menu, derivatives and integrals These calculators are also contains same set of features of es, ex calc series: - Advanced calculator 991 es plus: quadratic equation solver, cubic equation solver and newton solver. - Scientific calculator 115 es plus: complex number is supported.