$-\left(5+\left(4-1\right)\right)-\left(2-\left(8-\left(3+2\right)\right)\right)+\left(5-9\right)-\left(-3\right)$

$2x-6<\left(x+1\right)$

$\int\left(\frac{\left(4x-6\right)}{e^{x^2-3x}}\right)dx$

$-\left(-90\right)-55+\left(-19-3-7-7-8\right)$

$4\sin^2x+4\sin x+4=3$

$\frac { x ^ { 2 } - 16 } { x ^ { 2 } + 8 x + 16 }$

$\lim_{x\to\infty}\left(x^2+1\right)^{\frac{1}{2}}-e^{2x}$