$5x\:-\:2y\:+\:\:3z\:-\:2x\:+\:y\:-\:\left[\:x\:-\:\left(\:2x\:+\:3y\:+\:z\right)\:+\:2y\:\right]\:$
$\frac{3dy}{dt}=y-2$
$25x^2+50+1$
$x^2-2x+6=0$
$-46-77-35$
$\frac{a^3-64}{a-4}$
$\int_2^{-2}-x\sqrt{4-t^2}dx$
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