$\left(x+2\right)+\left(x+3\right)+\:\left(x+2\right)+\left(x+3\right)+\left(z-2\right)+\left(b-y\right)+\:\left(z-2\right)+\left(b-y\right)+\left(a+x\right)+\left(b-y\right)+\:\left(a+x\right)+\left(b-y\right)$

$29y^2+33y^2+25y^2+y^2+13y^2+55y^2$

$\frac{a^4+a}{a+1}$

$3x-8y-12+4x-7$

$3a^2+ab$

$\int_{-1}^1\left(xy\cos\left(y\right)\right)dx$

$y=2x+5y$