$5+y=-6$

$8x^3+64y^3$

$-6=\frac{n}{2}-10$

$10+\left(120-21\cdot3+10\right)\cdot2+3-\left[6\cdot9-\left(80-18\cdot4\right)\cdot4\right]+18+2$

$\log_{90}\left(2\right)+\log_{90}\left(4x^2\right)=1$

$\left(1-\tan^2\left(x\right)\right)\cos^2\left(x\right)=1-2\sin^2\left(x\right)$

$-2x^3y^4\left(x^4y^{-1}+2x^{-2}y^4\right)$