$\left(x^2-5x+5\right)^2$
$2\cos^2\left(t\right)=\cos\left(t\right)+1$
$2x\cdot9-x$
$-3x^2+2y^2-7+10x^2-12y^2+15$
$\frac{3}{3}+4+\left(-4\right)$
$v^2+10v-9=0$
$\int x^{-69}dx$
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