$7.6x-4.9x=43.2$
$y=\frac{\left(x+1\right)^2}{\left(x-1\right)^2}$
$\int x\left(2^x-x\right)dx$
$-a^2=3$
$y^4+16+2y^3+8y$
$25+19-5\left(108-107\right)-28+7$
$\int\left(x^2-2x\right)\cdot e^xdx$
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