$$4x-5=-5$$

$$\left(m+4\right)\left(m+-5\right)$$

$$t\left(x\right)=6x^2+13x+6x^2+26x+29y+28$$

$$4-100a^4$$

$$\left(x^2-1\right)y^3dx+x^2dy$$

$$\frac{sen\:\left(x\right)\:tan\left(x\right)}{csc\:\left(x\right)\:-cot\:\left(x\right)}-sen\:\left(x\right)=\tan\left(x\right)$$

$$47m^5n^4+-97m^3n^4$$