$e^{-3t}$
$n^{n-2}$ *( $n^{2}$ -2*n*n+n*n-n)* $e^{-n}$
9y^2+30y=-25
5x^2+2=-7x
x-20x
2v^2=-9v-4
(1/2m²n-2m)²
ñ1²
1 $frc{Bo}{Bo}$
-2(u+1)(-u+9)=0
1- csc (a)^(2)
1- csc (a)^(2)= cot (a)^(2)
