$\int\frac{x}{\left(x-1\right)\left(x^2+x-1\right)}dx$
$\left(3x^2-2\right)\left(9x^4+6x^2+4\right)$
$-14+11y=19$
$\int\frac{x^2+8x-1}{x^3-x}dx$
$6x^2.\:6x^4.\:2x^2$
$\frac{n^2}{9}+mn^2+9m^2$
$\left(5x+\frac{3}{5}\right)\cdot\left(5x-\frac{3}{5}\right)$
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