$-6x=-3-7x$
$-2\cdot\left(x-4\right)+2x>-4x$
$\int\frac{6x-1}{x^2-3x+2}dx$
$tan\left(a\right)^2x\:cot\left(a\right)x\:cos\left(a\right)$
$\lim_{x\to\infty}\left(\frac{7x+2}{x^2-5}\right)$
$y^2-2yx+x^2$
$5m^2x-10m^2y+20n^2t$
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