3x $a^{2}$ +7x+2=0
6x+(28−10x):2=7.(−5)+x
3x^2=2
1000 = x+(x+950)
prove tan(x/2) = 2+sinx+2cosx
x = x + 3
4^2x-1 -1 : 8^2x = 16 . 2^2-2x
/-3 3/4/
4x . 3x^2
2/5+4.32/1