$x^2+2x^2-3x$
$4tan\left(a\right)=5$
$sin\left(y\right)cos\left(x\right)dx\:+\:dy=0$
$5\left[7+3\left(2x-4\right)\right]+8$
$3^2+2^2-\left(2\cdot3\cdot2\right)\cdot0.$
$5x-50=x+30$
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