$\lim_{x\to0}\frac{4x+3}{3x+1}-3$
$\frac{x+3}{x}$
$6t+4t^2-52^2+8t$
$\frac{x-5}{2x-4}\ge3$
$\int\left(x^3-64-12x^2+48x\right)dx$
$\int m^{12}dm$
$25m^4-15m^3+5m^2$
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