$\frac{2x^3-6x^2-7}{x-3}$

$\left(a+b\right)\left(a^2+b^2\right)\left(a^4+b^4\right)$

$6\:\frac{1}{6}+12\:\frac{1}{2}$

$7ab^2+21a^3b+14a^2b^3$

$\int_{-o.3}^{0.2}4e^{8x}dx$

$\frac{1+\sec\left(a\right)}{\tan\left(a\right)}=\cot\left(\frac{a}{2}\right)$

$\frac{x^4-2x^3+2x+0-1}{x-3}$