$x^2-10x+90$
$7\sin^2\left(x\right)+3\sin\left(x\right)=-\left(-4\right)$
$\lim_{x\to2}\left(x^2-3x+1\right)$
$\lim_{x\to\infty}\:\left(-3x^2-8x-9\right)$
$\frac{3x+1}{4}\cdot\frac{15}{x+3}$
$20+90+510$
$\int\left(-3x^4\right)dx$
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