expressions.append(value:"\\frac{d}{dx} e^x")
expressions.append(value:"\\frac{d}{dx} sin(x)")
expressions.append(value:"\\int_{-3}^{2} x^2 dx")
expressions.append(value:"\\int_{0}^{\\infty} tan(x) dx")
expressions.append(value:"\\int_{-1}^{1} \\frac{1}{x} dx")
expressions.append(value:"\\int e^x dx")
expressions.append(value:"\\int_1^4 x^3 dx")
expressions.append(value:"\\int_{-3}^{2} x dx")
expressions.append(value:"\\int_{0}^{\\infty} sec(x) dx")
expressions.append(value:"\\int_{-1}^{1} \\frac{1}{x^2} dx")