$m^3-1$
$a+1\cdot x+x-1$
$-\:\left(x\:+\:y\right)\:+\:\left[3x\:-\:2y\:+\:-\:8x\:-\:5y\:-\:\left(6x\:-\:8y\:-\:7y\right)\:-\:6x\right]\:$
$3=12$
$2\cos\left(x\right)-2\cos^2\left(x\right)=0$
$\frac{9.8}{48.2}$
$\frac{x^2}{x^2-6x+5}$
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