$\left(y+3\right)^2+6\left(y+3\right)+9$
$x+\frac{1}{x}-x^2+1$
$-18x+30$
$\frac{2x^3-3x^2+5x-7}{x+1}$
$\int2\:x^2\:\:sen\left(5x\right)dx$
$-1-1+\left(-8\right)$
$\:x\:+\:2y\:+\:x\:+\:2x+2y+x+2$
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