$\lim_{x\to1}4x^2$
$6.35-\left(-6.35\right)-6.35$
$3sec^2x-5secx-2=0$
$\int e^{7x}\sin9xdx$
$5x^2+12x^2$
$\left(2n+3m\right)^2$
$\left(1+x\right)^{-33}=0.402$
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