$-37a^4b^7+128a^4b^7$

$y^2+5y+6.25$

$-73n+13ab+27xy-35ab-48n-18xy+41n-24ab+58xy-73n-92ab-31n+43ab$

$y=\frac{\sin\:\left(3z+z^2\right)}{\left(6-z^4\right)^3}$

$\left(5x+y\right)\left(2x-5y+10\right)$

$x-7=-7$

$\frac{dy}{dx}\left(ysin\left(x\right)=xsin\left(y\right)\right)$