$2x^2-12x-14=0$
$3 \cdot 36 x ^ { 2 } - 84 x y + 49 y ^ { 2 }$
$\lim_{x\to\frac{\pi}{2}}\left(\sin\left(x\right)\right)$
$-14x\cdot2$
$f\left(x\right)=7\left(x\right)^2-49$
$\int x^2\left(3x^3+7\right)^5dx$
$130-96+210-100$
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