$20m^2-45$
$x^2-30x+196$
$g\left(x\right)=\frac{\left(x^2+1\right)^3\left(2x-1\right)^4}{x-2}$
$\left(2x^3-3x^2+3\right)+\left(2x-4x^2+5\right)$
$\int2cosh\left(x\right)dx$
$x''-x'-6x=0$
$4x^2+12x-9+10x-15$
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