5) \( -3 e^{2}+4 f^{2}-c f^{2} \) b) \( -2 x b-7 a b+6 t \) h) \( 2 x y+5 x y-4 x y \) D \( \frac{1}{4} x^{2}-\frac{3}{x} x^{2}= \)

Simplify the expression by following steps: - step0: Solution: \(-2xb-7ab+6t\) Calculate or simplify the expression \( 2 x y+5 x y-4 x y \). Simplify the expression by following steps: - step0: Solution: \(2xy+5xy-4xy\) - step1: Collect like terms: \(\left(2+5-4\right)xy\) - step2: Calculate: \(3xy\) Calculate or simplify the expression \( -3 e^{2}+4 f^{2}-c f^{2} \). Simplify the expression by following steps: - step0: Solution: \(-3e^{2}+4f^{2}-cf^{2}\) Calculate or simplify the expression \( \frac{1}{4} x^{2}-\frac{3}{x} x^{2} \). Simplify the expression by following steps: - step0: Solution: \(\frac{1}{4}x^{2}-\frac{3}{x}\times x^{2}\) - step1: Reduce the fraction: \(\frac{1}{4}x^{2}-3x\) Aquí están las simplificaciones de las expresiones que proporcionaste: 5) \( -3 e^{2}+4 f^{2}-c f^{2} \) se simplifica a: \[ -3e^{2}+4f^{2}-cf^{2} \] b) \( -2 x b-7 a b+6 t \) se simplifica a: \[ -2xb-7ab+6t \] h) \( 2 x y+5 x y-4 x y \) se simplifica a: \[ 3xy \] D) \( \frac{1}{4} x^{2}-\frac{3}{x} x^{2} \) se simplifica a: \[ \frac{1}{4}x^{2}-3x \]