χ=−μ0e26m⟨r2⟩,\chi = -\frac{\mu_0 e^2}{6m} \langle r^2 \rangle,
simplify
4x^2-4x+2
Q=a-b(a+cb+d\frac{a+c }{b+d}b+da+c)
antiderivative 1/x²
how to find the area of a triangle
how to work out the size of a triangle
2X+4=3X=2
how to
1/(x^10) = 0.5
