1+cos2θ/sin2θ=cotθ
factorise
$9x^{2}$ +$3x^{3}$
9^x=25 what is 3^x=?
four and one third times six
factorize 36 $x^{3}$ + 24 $x^{5}$
2 [-3 (4-1-6 +3) -4] - [3-6 +2 -8]
find y and x with : yxyx = x^2/4
2x( $x^{2}$ )
(D ^ 2 + 4D + 4) * y = e ^ (2x) + 2 ^ x
