$9x+5y=69$

$\left(7x^4y^5\right)^2.\left(10x^3y^2\right)^2$

$5sin^2\left(x\right)+6cos^2\left(x\right)=5+cos^2\left(x\right)$

$5x+\frac{3}{x^2}+2x-3$

$\frac{\left(1+cscx\right)}{secx}=cosx+cotx$

$\int_0^{\infty}\left(\frac{90}{\left(3x+1\right)^4}\right)dx$

$\left(3x+abc\right)^2$