5a-7a
2.5% in fractions
$8x^{2}$-35=-18x
6x= $2x^{2}$ -7x+14
if (x-1) (x+2)=0
3*x - x^3 + 6.6 = 0
9*x^2-x-15=0
$-7f^{2}$ +11f+9=4-3f
5th root of -32 raise to the power of -4
0.4(2-q)=0.2(q+7)
