$$-7y=-98$$

$$-2m+3n-6:3m-8n:-5m+24y+2z$$

$$\frac{senx+cosxtanx}{cosx}$$

$$9\tan^2x-9\tan^2x\sin^2x$$

$$3\left(x+1\right)-4\left(x-1\right)+1=0$$

$$\left(g^3+g^2\right)^2$$

$$\left[-x\right]^3$$