$7a\:+\:7b\:-\:7c\:-\:7$
$\int-2xsin\left(-x+2\right)dx$
$\sqrt[5]{27x}\cdot\sqrt{3x^2}$
$\lim_{x\to2}\left(\frac{x-2}{x^2-4}\right)^{\frac{x}{x-2}}$
$\sqrt{3}\cdot\:\:x=-\sqrt{3}\cdot\:\:x+6$
$-25-6x$
$x^2+7x=12$
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