$x^2-x+6=0$
$\int_{-\infty\:}^0\left(\sin\left(x\right)e^{\cos\left(x\right)}\right)dx$
$25x^2+200x+400$
$\left(4x-11y\right)\left(4x+11y\right)$
$\lim_{x\to-\infty}\left(x\sin\left(\frac{1}{x}\right)-\frac{\sin\left(x\right)}{x}\right)$
$6x^2-9x+15$
$6\cdot5^2$
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