(2x+5)(5x-3)(3x-4)
654321234567898765432123+643212345678909876543=
(2x-1)(x-5)(x+6)
(x+5)(x+3)^2
3( $x^{2}$-2yz+ $y^{2}$) -4( $x^{2}$- $y^{2}$-3yz)+ $x^{2}$ + $y^{2}$
(t-2)(t+5)(t-4)
(3x-4)(5x+2)
(3x+4)(5x+2)
∫ tan x dx
6948 : 243
