$\left(2c+3m\right)\left(2c+3m\right)$
$3^2+\left(-4\right)^2$
$3x+5\ge6x+7$
$18-x>5$
$t^2-1.4t+.49$
$x^2-\sqrt{3}x-18=0$
$\frac{1}{1+\sin x}=\frac{\sec x-\sin x\left(\sec x\right)}{\cos x}$
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