$\left(-1\right)\:+\:\left(-1\right)\:+\:\left(-1\right)\:+\:\left(-1\right)\:+\:\left(-1\right)\:$
$8+x=7$
$x-3<4x-5$
$2\sin^2\left(x\right)+3\cos^2\left(x\right)-3=0$
$8.2x-4.9x=99$
$6x-2x^2=0$
$\frac{3x+6}{6x-6}$
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