$\left(x+3\right)^2+5\left(x-5\right)^2$
$\left(2x^5+2x^4\right)\left(x^{-5}+2\right)\left(x^3+x^{-2}+5\right)$
$4.15\cdot0.983$
$\int\left(5\cos\frac{x}{5}\right)dx$
$-x^3+2x^2+5x+1-3x^2+2$
$\left(11x+2\right)\left(11x-7\right)$
$z^2+2z+z$
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