$a^5.\:a^3\:=a^{15}$

$\frac{dy}{dx}=\frac{y^2+10y+25}{x^2-12x+36}$

$\left(9x^2-4x+1\right)\left(6x^3-5x\right)$

$( 2 m + 7 ) ^ { 2 }$

$\int\frac{2x^2+x+4}{2x\left(x+1\right)^2}dx$

$\int_0^1\left(1+x^2\right)e^{-x}dx$

$\cos^2\left(a\right)=\left(1-\sin\left(a\right)\right)\left(1+\sin\left(a\right)\right)$