• 2 x^2-x-1 vs d (2 x^2-x-1)/dx
• absolute value
• cos(x), cos'(x), cos''(x), cos'''(x), cos''''(x)
• d^2/dx^2 cos(x)
• d/dx {sinx, cosx, tanx, cotx, secx, cscx}
• domain and range (x^3+4)/x^2
• find zeros of (sqrt(x^2+x)-x)
• integrate cos(x) dx
• is cos'(x) an odd function?
• infinity
• limit 1/((x^2-1)/(2 x^2-x-1))
• limit (f(t+h)/f(t))^(1/h) as h -> 0
• limit of cos(x) as x -> +infinity
• limit 1/(1+1/n)
• limit tan(t) as t->pi/2 from the left
• lim ((x+h)^5 - x^5)/h as h->0
• sum 1/n^2, n=1 to infinity
• sum (3/4)^j, j=0..infinity
• sum x^n, n=0 to +oo
• sum 1/n^2
• 1/2 + 1/4 + 1/8 + 1/16 + ...
• infimum of x^2-2x infimum 1+(1/n)
• mathematical rules
• plot 1/(cos(x))
• polar plot abs(3 theta^3+2 theta)
• product rule, quotient rule, chain rule
• roots 2x^2 - x - 1
• series 1/cos(x)
• series of 2 x^2-x-1 at x = pi
• series sin x at x=pi/4
• series (sin x)/(x-pi) at x=pi to order 10
• tangent line of y = 3 x^3+2 x at x = 2/5
• taylor polynomial degree 3 of (x^3+4)/x^2 at x=1
• taylor series sin x
• x < 0
• harmonic mean {1, 2, 3}
• kurtosis of {1, 2, 3}
• {1, -1, 0}x{0, 1, -1}
• inflection points of x+sin(x)

• (complement S) intersect (A union B)
• P && (Q or R)