$5x+2x+2y$

$\int_0^{\frac{\pi}{2}}\left(3\cos\left(12x\right)\cos\left(13x\right)\right)dx$

$9\left(x-y\right)^2+12\left(x-y\right)\left(x+y\right)+4\left(x+y^2\right)$

$\left(\frac{x+1}{x+b}\right)+\left(\frac{ax+by}{ax+xy}\right)$

$\left(7x^3y+4^2\right)$

$6w+10=-7m+5m+2$

$\int\left(x-1\right)^7\left(x+1\right)dx$