$2x\left(3x-5\right)+7x\left(1-x\right)=-10$
$-2x^2+x+1$
$y=\log_{10}\sqrt{1+3x^2}$
$\left(2-3\right)^2+8\left(4-1\right)^2$
$cos=0.45$
$\left(-2d+9\right)\left(9d-2\right)$
$\left(5y^{a+1}+4\right)\left(5y^{a+1}-15\right)$
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