$4m^2+1=0$
$\sqrt{7-21\left(-2\right)}$
$4\cos\left(x\right)-3=0$
$\left(2x+4xh+2h^2-3\right)^2$
$378.2\cdot3.47$
$+3\:+\:5\:-\:3\:+\:6\:-\:8\:+\:3\:+\:2\:-\:4$
$50ab^2-c^3.35abc$
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