$\left(\frac{1}{3}p^2+2.4q\right)\left(\frac{1}{3}p^2-2.4q\right)$

$-2\::\:-3$

$\frac{\sin\left(3a\right)-\sin\left(a\right)}{\cos\left(3a\right)+\cos\left(a\right)}=\tan\left(a\right)$

$\frac{3x^5+12x^3-8x^4-6x^2+3x-7}{x^2-2x+3}$

$\frac{1}{2}a^2-\frac{4}{7}a^2+2a^2b$

$\frac{dy}{dx}\left(10x-7\right)$

$-2+\left(+7\right)-4+\left(+10\right)+0-2-4-3-6-7+\left(+2\right)+\left(+4\right)+\left(+7\right)-1+\left(+6\right)$