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x^2 + 2x + 3use ^, e.g. x^2 (not “x squared”)Roots
sqrt(x+1)or \sqrt{x+1}Fractions
(x+1)/(x-2)or \frac{x+1}{x-2}Equations
x^2 + 5x + 6 = 0use =Trigonometry
sin(x), cos(2x)angles in radians; sin 30 for degreesInverse trig
asin(x), arctan(x)or sin^(-1)(x)Log / exp
ln(x), log(x), e^xDerivative
differentiate x^3or d/dx(x^3)Integral
integrate x^2or \int x^2 dxIntegral (limits)
\int^3_1 x^2 dx^ = upper, _ = lowerLimit
lim x->0 sin(x)/xWord / aptitude
25% of 80or “speed if 150 km in 3 hours”
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